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cef/libcef/renderer/content_renderer_client.cc

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// Copyright (c) 2013 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/compiler_specific.h"
#include "config.h"
MSVC_PUSH_WARNING_LEVEL(0);
#include "bindings/v8/V8Binding.h"
#include "bindings/v8/V8RecursionScope.h"
MSVC_POP_WARNING();
#undef ceil
#undef FROM_HERE
#undef LOG
#include "libcef/renderer/content_renderer_client.h"
#include "libcef/browser/context.h"
#include "libcef/common/cef_messages.h"
#include "libcef/common/cef_switches.h"
#include "libcef/common/content_client.h"
#include "libcef/common/request_impl.h"
#include "libcef/common/values_impl.h"
#include "libcef/renderer/browser_impl.h"
#include "libcef/renderer/render_frame_observer.h"
#include "libcef/renderer/render_message_filter.h"
#include "libcef/renderer/render_process_observer.h"
#include "libcef/renderer/thread_util.h"
#include "libcef/renderer/v8_impl.h"
#include "libcef/renderer/webkit_glue.h"
#include "base/command_line.h"
#include "base/path_service.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/renderer/loadtimes_extension_bindings.h"
#include "chrome/renderer/printing/print_web_view_helper.h"
#include "content/child/child_thread.h"
#include "content/child/worker_task_runner.h"
#include "content/common/frame_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_paths.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/render_view.h"
#include "content/renderer/render_frame_impl.h"
#include "ipc/ipc_sync_channel.h"
#include "media/base/media.h"
#include "third_party/WebKit/public/platform/WebPrerenderingSupport.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/platform/WebWorkerRunLoop.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebKit.h"
#include "third_party/WebKit/public/web/WebPluginParams.h"
#include "third_party/WebKit/public/web/WebPrerendererClient.h"
#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
#include "third_party/WebKit/public/web/WebSecurityPolicy.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "third_party/WebKit/public/web/WebWorkerInfo.h"
#include "v8/include/v8.h"
namespace {
// Stub implementation of blink::WebPrerenderingSupport.
class CefPrerenderingSupport : public blink::WebPrerenderingSupport {
public:
virtual ~CefPrerenderingSupport() {}
private:
virtual void add(const blink::WebPrerender& prerender) OVERRIDE {}
virtual void cancel(const blink::WebPrerender& prerender) OVERRIDE {}
virtual void abandon(const blink::WebPrerender& prerender) OVERRIDE {}
};
// Stub implementation of blink::WebPrerendererClient.
class CefPrerendererClient : public content::RenderViewObserver,
public blink::WebPrerendererClient {
public:
explicit CefPrerendererClient(content::RenderView* render_view)
: content::RenderViewObserver(render_view) {
DCHECK(render_view);
render_view->GetWebView()->setPrerendererClient(this);
}
private:
virtual ~CefPrerendererClient() {}
virtual void willAddPrerender(blink::WebPrerender* prerender) OVERRIDE {}
};
// Implementation of SequencedTaskRunner for WebWorker threads.
class CefWebWorkerTaskRunner : public base::SequencedTaskRunner,
public content::WorkerTaskRunner::Observer {
public:
CefWebWorkerTaskRunner(content::WorkerTaskRunner* runner,
int worker_id)
: runner_(runner),
worker_id_(worker_id) {
DCHECK(runner_);
DCHECK_GT(worker_id_, 0);
DCHECK(RunsTasksOnCurrentThread());
// Adds an observer for the current thread.
runner_->AddStopObserver(this);
}
// SequencedTaskRunner methods:
virtual bool PostNonNestableDelayedTask(
const tracked_objects::Location& from_here,
const base::Closure& task,
base::TimeDelta delay) OVERRIDE {
return PostDelayedTask(from_here, task, delay);
}
// TaskRunner methods:
virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
const base::Closure& task,
base::TimeDelta delay) OVERRIDE {
if (delay != base::TimeDelta())
LOG(WARNING) << "Delayed tasks are not supported on WebWorker threads";
runner_->PostTask(worker_id_, task);
return true;
}
virtual bool RunsTasksOnCurrentThread() const OVERRIDE {
return (runner_->CurrentWorkerId() == worker_id_);
}
// WorkerTaskRunner::Observer methods:
virtual void OnWorkerRunLoopStopped() OVERRIDE {
CefContentRendererClient::Get()->RemoveWorkerTaskRunner(worker_id_);
}
private:
content::WorkerTaskRunner* runner_;
int worker_id_;
};
} // namespace
CefContentRendererClient::CefContentRendererClient()
: devtools_agent_count_(0),
uncaught_exception_stack_size_(0),
single_process_cleanup_complete_(false) {
}
CefContentRendererClient::~CefContentRendererClient() {
}
// static
CefContentRendererClient* CefContentRendererClient::Get() {
return static_cast<CefContentRendererClient*>(
CefContentClient::Get()->renderer());
}
CefRefPtr<CefBrowserImpl> CefContentRendererClient::GetBrowserForView(
content::RenderView* view) {
CEF_REQUIRE_RT_RETURN(NULL);
BrowserMap::const_iterator it = browsers_.find(view);
if (it != browsers_.end())
return it->second;
return NULL;
}
CefRefPtr<CefBrowserImpl> CefContentRendererClient::GetBrowserForMainFrame(
blink::WebFrame* frame) {
CEF_REQUIRE_RT_RETURN(NULL);
BrowserMap::const_iterator it = browsers_.begin();
for (; it != browsers_.end(); ++it) {
content::RenderView* render_view = it->second->render_view();
if (render_view && render_view->GetWebView() &&
render_view->GetWebView()->mainFrame() == frame) {
return it->second;
}
}
return NULL;
}
void CefContentRendererClient::OnBrowserDestroyed(CefBrowserImpl* browser) {
BrowserMap::iterator it = browsers_.begin();
for (; it != browsers_.end(); ++it) {
if (it->second.get() == browser) {
browsers_.erase(it);
return;
}
}
// No browser was found in the map.
NOTREACHED();
}
void CefContentRendererClient::WebKitInitialized() {
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
// Create global objects associated with the default Isolate.
CefV8IsolateCreated();
blink::WebRuntimeFeatures::enableMediaPlayer(
media::IsMediaLibraryInitialized());
// TODO(cef): Enable these once the implementation supports it.
blink::WebRuntimeFeatures::enableNotifications(false);
blink::WebRuntimeFeatures::enableMediaStream(
command_line.HasSwitch(switches::kEnableMediaStream));
const CefContentClient::SchemeInfoList* schemes =
CefContentClient::Get()->GetCustomSchemes();
if (!schemes->empty()) {
// Register the custom schemes.
CefContentClient::SchemeInfoList::const_iterator it = schemes->begin();
for (; it != schemes->end(); ++it) {
const CefContentClient::SchemeInfo& info = *it;
const blink::WebString& scheme =
blink::WebString::fromUTF8(info.scheme_name);
if (info.is_standard) {
// Standard schemes must also be registered as CORS enabled to support
// CORS-restricted requests (for example, XMLHttpRequest redirects).
blink::WebSecurityPolicy::registerURLSchemeAsCORSEnabled(scheme);
}
if (info.is_local)
blink::WebSecurityPolicy::registerURLSchemeAsLocal(scheme);
if (info.is_display_isolated)
blink::WebSecurityPolicy::registerURLSchemeAsDisplayIsolated(scheme);
}
}
if (!cross_origin_whitelist_entries_.empty()) {
// Add the cross-origin white list entries.
for (size_t i = 0; i < cross_origin_whitelist_entries_.size(); ++i) {
const Cef_CrossOriginWhiteListEntry_Params& entry =
cross_origin_whitelist_entries_[i];
GURL gurl = GURL(entry.source_origin);
blink::WebSecurityPolicy::addOriginAccessWhitelistEntry(
gurl,
blink::WebString::fromUTF8(entry.target_protocol),
blink::WebString::fromUTF8(entry.target_domain),
entry.allow_target_subdomains);
}
cross_origin_whitelist_entries_.clear();
}
// The number of stack trace frames to capture for uncaught exceptions.
if (command_line.HasSwitch(switches::kUncaughtExceptionStackSize)) {
int uncaught_exception_stack_size = 0;
base::StringToInt(
command_line.GetSwitchValueASCII(switches::kUncaughtExceptionStackSize),
&uncaught_exception_stack_size);
if (uncaught_exception_stack_size > 0) {
uncaught_exception_stack_size_ = uncaught_exception_stack_size;
CefV8SetUncaughtExceptionStackSize(uncaught_exception_stack_size_);
}
}
// Notify the render process handler.
CefRefPtr<CefApp> application = CefContentClient::Get()->application();
if (application.get()) {
CefRefPtr<CefRenderProcessHandler> handler =
application->GetRenderProcessHandler();
if (handler.get())
handler->OnWebKitInitialized();
}
}
void CefContentRendererClient::OnRenderProcessShutdown() {
// Destroy global objects associated with the default Isolate.
CefV8IsolateDestroyed();
}
void CefContentRendererClient::DevToolsAgentAttached() {
CEF_REQUIRE_RT();
++devtools_agent_count_;
}
void CefContentRendererClient::DevToolsAgentDetached() {
CEF_REQUIRE_RT();
--devtools_agent_count_;
if (devtools_agent_count_ == 0 && uncaught_exception_stack_size_ > 0) {
// When the last DevToolsAgent is detached the stack size is set to 0.
// Restore the user-specified stack size here.
CefV8SetUncaughtExceptionStackSize(uncaught_exception_stack_size_);
// And do the same for any WebWorker threads.
WorkerTaskRunnerMap map_copy;
{
base::AutoLock lock_scope(worker_task_runner_lock_);
map_copy = worker_task_runner_map_;
}
WorkerTaskRunnerMap::const_iterator it = map_copy.begin();
for (; it != map_copy.end(); ++it) {
it->second->PostTask(FROM_HERE,
base::Bind(CefV8SetUncaughtExceptionStackSize,
uncaught_exception_stack_size_));
}
}
}
scoped_refptr<base::SequencedTaskRunner>
CefContentRendererClient::GetCurrentTaskRunner() {
// Check if currently on the render thread.
if (CEF_CURRENTLY_ON_RT())
return render_task_runner_;
// Check if a WebWorker exists for the current thread.
content::WorkerTaskRunner* worker_runner =
content::WorkerTaskRunner::Instance();
int worker_id = worker_runner->CurrentWorkerId();
if (worker_id > 0) {
base::AutoLock lock_scope(worker_task_runner_lock_);
WorkerTaskRunnerMap::const_iterator it =
worker_task_runner_map_.find(worker_id);
if (it != worker_task_runner_map_.end())
return it->second;
scoped_refptr<base::SequencedTaskRunner> task_runner =
new CefWebWorkerTaskRunner(worker_runner, worker_id);
worker_task_runner_map_[worker_id] = task_runner;
return task_runner;
}
return NULL;
}
scoped_refptr<base::SequencedTaskRunner>
CefContentRendererClient::GetWorkerTaskRunner(int worker_id) {
base::AutoLock lock_scope(worker_task_runner_lock_);
WorkerTaskRunnerMap::const_iterator it =
worker_task_runner_map_.find(worker_id);
if (it != worker_task_runner_map_.end())
return it->second;
return NULL;
}
void CefContentRendererClient::RemoveWorkerTaskRunner(int worker_id) {
base::AutoLock lock_scope(worker_task_runner_lock_);
WorkerTaskRunnerMap::iterator it = worker_task_runner_map_.find(worker_id);
if (it != worker_task_runner_map_.end())
worker_task_runner_map_.erase(it);
}
void CefContentRendererClient::RunSingleProcessCleanup() {
DCHECK(content::RenderProcessHost::run_renderer_in_process());
// Make sure the render thread was actually started.
if (!render_task_runner_)
return;
if (content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)) {
RunSingleProcessCleanupOnUIThread();
} else {
content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
base::Bind(&CefContentRendererClient::RunSingleProcessCleanupOnUIThread,
base::Unretained(this)));
}
// Wait for the render thread cleanup to complete. Spin instead of using
// base::WaitableEvent because calling Wait() is not allowed on the UI
// thread.
bool complete = false;
do {
{
base::AutoLock lock_scope(single_process_cleanup_lock_);
complete = single_process_cleanup_complete_;
}
if (!complete)
base::PlatformThread::YieldCurrentThread();
} while (!complete);
}
void CefContentRendererClient::RenderThreadStarted() {
render_task_runner_ = base::MessageLoopProxy::current();
observer_.reset(new CefRenderProcessObserver());
content::RenderThread* thread = content::RenderThread::Get();
thread->AddObserver(observer_.get());
thread->GetChannel()->AddFilter(new CefRenderMessageFilter);
thread->RegisterExtension(extensions_v8::LoadTimesExtension::Get());
if (content::RenderProcessHost::run_renderer_in_process()) {
// When running in single-process mode register as a destruction observer
// on the render thread's MessageLoop.
base::MessageLoop::current()->AddDestructionObserver(this);
}
// Note that under Linux, the media library will normally already have
// been initialized by the Zygote before this instance became a Renderer.
base::FilePath media_path;
PathService::Get(content::DIR_MEDIA_LIBS, &media_path);
if (!media_path.empty())
media::InitializeMediaLibrary(media_path);
blink::WebPrerenderingSupport::initialize(new CefPrerenderingSupport());
// Retrieve the new render thread information synchronously.
CefProcessHostMsg_GetNewRenderThreadInfo_Params params;
thread->Send(new CefProcessHostMsg_GetNewRenderThreadInfo(&params));
// Cross-origin entries need to be added after WebKit is initialized.
cross_origin_whitelist_entries_ = params.cross_origin_whitelist_entries;
// Notify the render process handler.
CefRefPtr<CefApp> application = CefContentClient::Get()->application();
if (application.get()) {
CefRefPtr<CefRenderProcessHandler> handler =
application->GetRenderProcessHandler();
if (handler.get()) {
CefRefPtr<CefListValueImpl> listValuePtr(
new CefListValueImpl(&params.extra_info, false, true));
handler->OnRenderThreadCreated(listValuePtr.get());
listValuePtr->Detach(NULL);
}
}
}
void CefContentRendererClient::RenderFrameCreated(
content::RenderFrame* render_frame) {
new CefRenderFrameObserver(render_frame);
BrowserCreated(render_frame->GetRenderView(), render_frame);
}
void CefContentRendererClient::RenderViewCreated(
content::RenderView* render_view) {
BrowserCreated(render_view, render_view->GetMainRenderFrame());
}
bool CefContentRendererClient::OverrideCreatePlugin(
content::RenderFrame* render_frame,
blink::WebLocalFrame* frame,
const blink::WebPluginParams& params,
blink::WebPlugin** plugin) {
CefRefPtr<CefBrowserImpl> browser =
CefBrowserImpl::GetBrowserForMainFrame(frame->top());
if (!browser || !browser->is_windowless())
return false;
#if defined(ENABLE_PLUGINS)
if (base::UTF16ToASCII(params.mimeType) == content::kBrowserPluginMimeType)
return false;
content::RenderFrameImpl* render_frame_impl =
static_cast<content::RenderFrameImpl*>(render_frame);
content::WebPluginInfo info;
std::string mime_type;
bool found = false;
render_frame_impl->Send(
new FrameHostMsg_GetPluginInfo(
render_frame_impl->GetRoutingID(),
params.url,
frame->top()->document().url(),
params.mimeType.utf8(),
&found,
&info,
&mime_type));
if (!found)
return false;
bool flash = LowerCaseEqualsASCII(mime_type,
"application/x-shockwave-flash");
bool silverlight = StartsWithASCII(mime_type,
"application/x-silverlight", false);
if (flash) {
// "wmode" values of "opaque" or "transparent" are allowed.
size_t size = params.attributeNames.size();
for (size_t i = 0; i < size; ++i) {
std::string name = params.attributeNames[i].utf8();
if (name == "wmode") {
std::string value = params.attributeValues[i].utf8();
if (value == "opaque" || value == "transparent")
flash = false;
break;
}
}
}
if (flash || silverlight) {
// Force Flash and Silverlight plugins to use windowless mode.
blink::WebPluginParams params_to_use = params;
params_to_use.mimeType = blink::WebString::fromUTF8(mime_type);
size_t size = params.attributeNames.size();
blink::WebVector<blink::WebString> new_names(size+1),
new_values(size+1);
for (size_t i = 0; i < size; ++i) {
new_names[i] = params.attributeNames[i];
new_values[i] = params.attributeValues[i];
}
if (flash) {
new_names[size] = "wmode";
new_values[size] = "opaque";
} else if (silverlight) {
new_names[size] = "windowless";
new_values[size] = "true";
}
params_to_use.attributeNames.swap(new_names);
params_to_use.attributeValues.swap(new_values);
*plugin = render_frame_impl->CreatePlugin(frame, info, params_to_use);
return true;
}
#endif // defined(ENABLE_PLUGINS)
return false;
}
bool CefContentRendererClient::HandleNavigation(
content::RenderFrame* render_frame,
content::DocumentState* document_state,
int opener_id,
blink::WebFrame* frame,
const blink::WebURLRequest& request,
blink::WebNavigationType type,
blink::WebNavigationPolicy default_policy,
bool is_redirect) {
CefRefPtr<CefApp> application = CefContentClient::Get()->application();
if (application.get()) {
CefRefPtr<CefRenderProcessHandler> handler =
application->GetRenderProcessHandler();
if (handler.get()) {
CefRefPtr<CefBrowserImpl> browserPtr =
CefBrowserImpl::GetBrowserForMainFrame(frame->top());
DCHECK(browserPtr.get());
if (browserPtr.get()) {
CefRefPtr<CefFrameImpl> framePtr = browserPtr->GetWebFrameImpl(frame);
CefRefPtr<CefRequest> requestPtr(CefRequest::Create());
CefRequestImpl* requestImpl =
static_cast<CefRequestImpl*>(requestPtr.get());
requestImpl->Set(request);
requestImpl->SetReadOnly(true);
cef_navigation_type_t navigation_type = NAVIGATION_OTHER;
switch (type) {
case blink::WebNavigationTypeLinkClicked:
navigation_type = NAVIGATION_LINK_CLICKED;
break;
case blink::WebNavigationTypeFormSubmitted:
navigation_type = NAVIGATION_FORM_SUBMITTED;
break;
case blink::WebNavigationTypeBackForward:
navigation_type = NAVIGATION_BACK_FORWARD;
break;
case blink::WebNavigationTypeReload:
navigation_type = NAVIGATION_RELOAD;
break;
case blink::WebNavigationTypeFormResubmitted:
navigation_type = NAVIGATION_FORM_RESUBMITTED;
break;
case blink::WebNavigationTypeOther:
navigation_type = NAVIGATION_OTHER;
break;
}
if (handler->OnBeforeNavigation(browserPtr.get(), framePtr.get(),
requestPtr.get(), navigation_type,
is_redirect)) {
return true;
}
}
}
}
return false;
}
void CefContentRendererClient::DidCreateScriptContext(
blink::WebFrame* frame, v8::Handle<v8::Context> context,
int extension_group, int world_id) {
CefRefPtr<CefBrowserImpl> browserPtr =
CefBrowserImpl::GetBrowserForMainFrame(frame->top());
DCHECK(browserPtr.get());
if (!browserPtr.get())
return;
CefRefPtr<CefFrameImpl> framePtr = browserPtr->GetWebFrameImpl(frame);
v8::Isolate* isolate = blink::mainThreadIsolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope scope(context);
WebCore::V8RecursionScope recursion_scope(
isolate,
WebCore::toExecutionContext(context));
CefRefPtr<CefV8Context> contextPtr(new CefV8ContextImpl(isolate, context));
// Notify the render process handler.
CefRefPtr<CefApp> application = CefContentClient::Get()->application();
if (application.get()) {
CefRefPtr<CefRenderProcessHandler> handler =
application->GetRenderProcessHandler();
if (handler.get())
handler->OnContextCreated(browserPtr.get(), framePtr.get(), contextPtr);
}
}
void CefContentRendererClient::WillReleaseScriptContext(
blink::WebFrame* frame, v8::Handle<v8::Context> context, int world_id) {
// Notify the render process handler.
CefRefPtr<CefApp> application = CefContentClient::Get()->application();
if (application.get()) {
CefRefPtr<CefRenderProcessHandler> handler =
application->GetRenderProcessHandler();
if (handler.get()) {
CefRefPtr<CefBrowserImpl> browserPtr =
CefBrowserImpl::GetBrowserForMainFrame(frame->top());
DCHECK(browserPtr.get());
if (browserPtr.get()) {
CefRefPtr<CefFrameImpl> framePtr = browserPtr->GetWebFrameImpl(frame);
v8::Isolate* isolate = blink::mainThreadIsolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope scope(context);
WebCore::V8RecursionScope recursion_scope(
isolate,
WebCore::toExecutionContext(context));
CefRefPtr<CefV8Context> contextPtr(
new CefV8ContextImpl(isolate, context));
handler->OnContextReleased(browserPtr.get(), framePtr.get(),
contextPtr);
}
}
}
CefV8ReleaseContext(context);
}
void CefContentRendererClient::WillDestroyCurrentMessageLoop() {
base::AutoLock lock_scope(single_process_cleanup_lock_);
single_process_cleanup_complete_ = true;
}
void CefContentRendererClient::BrowserCreated(
content::RenderView* render_view,
content::RenderFrame* render_frame) {
// Retrieve the browser information synchronously. This will also register
// the routing ids with the browser info object in the browser process.
CefProcessHostMsg_GetNewBrowserInfo_Params params;
content::RenderThread::Get()->Send(
new CefProcessHostMsg_GetNewBrowserInfo(
render_view->GetRoutingID(),
render_frame->GetRoutingID(),
&params));
DCHECK_GT(params.browser_id, 0);
// Don't create another browser object if one already exists for the view.
if (GetBrowserForView(render_view))
return;
#if defined(OS_MACOSX)
// FIXME: It would be better if this API would be a callback from the
// WebKit layer, or if it would be exposed as an WebView instance method; the
// current implementation uses a static variable, and WebKit needs to be
// patched in order to make it work for each WebView instance
render_view->GetWebView()->setUseExternalPopupMenusThisInstance(
!params.is_windowless);
#endif
CefRefPtr<CefBrowserImpl> browser =
new CefBrowserImpl(render_view, params.browser_id, params.is_popup,
params.is_windowless);
browsers_.insert(std::make_pair(render_view, browser));
new CefPrerendererClient(render_view);
new printing::PrintWebViewHelper(render_view);
// Notify the render process handler.
CefRefPtr<CefApp> application = CefContentClient::Get()->application();
if (application.get()) {
CefRefPtr<CefRenderProcessHandler> handler =
application->GetRenderProcessHandler();
if (handler.get())
handler->OnBrowserCreated(browser.get());
}
}
void CefContentRendererClient::RunSingleProcessCleanupOnUIThread() {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
// Clean up the single existing RenderProcessHost.
content::RenderProcessHost* host = NULL;
content::RenderProcessHost::iterator iterator(
content::RenderProcessHost::AllHostsIterator());
if (!iterator.IsAtEnd()) {
host = iterator.GetCurrentValue();
host->Cleanup();
iterator.Advance();
DCHECK(iterator.IsAtEnd());
}
DCHECK(host);
// Clear the run_renderer_in_process() flag to avoid a DCHECK in the
// RenderProcessHost destructor.
content::RenderProcessHost::SetRunRendererInProcess(false);
// Deletion of the RenderProcessHost object will stop the render thread and
// result in a call to WillDestroyCurrentMessageLoop.
// Cleanup() will cause deletion to be posted as a task on the UI thread but
// this task will only execute when running in multi-threaded message loop
// mode (because otherwise the UI message loop has already stopped). Therefore
// we need to explicitly delete the object when not running in this mode.
if (!CefContext::Get()->settings().multi_threaded_message_loop)
delete host;
}
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