Add chrome runtime support for more callbacks and ceftests (see issue #2969)

This change adds support for:
- Protocol and request handling.
- Loading and navigation events.
- Display and focus events.
- Mouse/keyboard events.
- Popup browsers.
- Callbacks in the renderer process.
- Misc. functionality required for ceftests.

This change also adds a new CefBrowserProcessHandler::GetCookieableSchemes
callback for configuring global state that will be applied to all
CefCookieManagers by default. This global callback is currently required by the
chrome runtime because the primary ProfileImpl is created via
ChromeBrowserMainParts::PreMainMessageLoopRun (CreatePrimaryProfile) before
OnContextCreated can be called.

ProfileImpl will use the "C:\Users\[user]\AppData\Local\CEF\User Data\Default"
directory by default (on Windows). Cookies may persist in this directory when
running ceftests and may need to be manually deleted if those tests fail.

Remaining work includes:
- Support for client-created request contexts.
- Embedding the browser in a Views hierarchy (cefclient support).
- TryCloseBrowser and DoClose support.
- Most of the CefSettings configuration.
- DevTools protocol and window control (ShowDevTools, ExecuteDevToolsMethod).
- CEF-specific WebUI pages (about, license, webui-hosts).
- Context menu customization (CefContextMenuHandler).
- Auto resize (SetAutoResizeEnabled).
- Zoom settings (SetZoomLevel).
- File dialog runner (RunFileDialog).
- File and JS dialog handlers (CefDialogHandler, CefJSDialogHandler).
- Extension loading (LoadExtension, etc).
- Plugin loading (OnBeforePluginLoad).
- Widevine loading (CefRegisterWidevineCdm).
- PDF and print preview does not display.
- Crash reporting is untested.
- Mac: Web content loads but does not display.

The following ceftests are now passing when run with the
"--enable-chrome-runtime" command-line flag:

CorsTest.*
DisplayTest.*:-DisplayTest.AutoResize
DOMTest.*
DraggableRegionsTest.*
ImageTest.*
MessageRouterTest.*
NavigationTest.*
ParserTest.*
RequestContextTest.*Global*
RequestTest.*
ResourceManagerTest.*
ResourceRequestHandlerTest.*
ResponseTest.*
SchemeHandlerTest.*
ServerTest.*
StreamResourceHandlerTest.*
StreamTest.*
StringTest.*
TaskTest.*
TestServerTest.*
ThreadTest.*
URLRequestTest.*Global*
V8Test.*:-V8Test.OnUncaughtExceptionDevTools
ValuesTest.*
WaitableEventTest.*
XmlReaderTest.*
ZipReaderTest.*

libcef/browser/net_service/resource_request_handler_wrapper.cc

@@ -5,7 +5,6 @@
 #include "libcef/browser/net_service/resource_request_handler_wrapper.h"
 
 #include "libcef/browser/browser_host_base.h"
-#include "libcef/browser/browser_platform_delegate.h"
 #include "libcef/browser/context.h"
 #include "libcef/browser/iothread_state.h"
 #include "libcef/browser/net_service/cookie_helper.h"
@@ -256,7 +255,8 @@ class InterceptedRequestHandlerWrapper : public InterceptedRequestHandler {
                     int frame_tree_node_id,
                     bool is_navigation,
                     bool is_download,
-                    const url::Origin& request_initiator) {
+                    const url::Origin& request_initiator,
+                    const base::Closure& unhandled_request_callback) {
       CEF_REQUIRE_UIT();
 
       browser_context_ = browser_context;
@@ -264,7 +264,7 @@ class InterceptedRequestHandlerWrapper : public InterceptedRequestHandler {
           CefBrowserContext::FromBrowserContext(browser_context);
       iothread_state_ = cef_browser_context->iothread_state();
       DCHECK(iothread_state_);
-      cookieable_schemes_ = cef_browser_context->cookieable_schemes();
+      cookieable_schemes_ = cef_browser_context->GetCookieableSchemes();
 
       // We register to be notified of CEF context or browser destruction so
       // that we can stop accepting new requests and cancel pending/in-progress
@@ -284,6 +284,7 @@ class InterceptedRequestHandlerWrapper : public InterceptedRequestHandler {
       is_navigation_ = is_navigation;
       is_download_ = is_download;
       request_initiator_ = request_initiator.Serialize();
+      unhandled_request_callback_ = unhandled_request_callback;
 
       // Default values for standard headers.
       accept_language_ = ComputeAcceptLanguageFromPref(
@@ -320,6 +321,7 @@ class InterceptedRequestHandlerWrapper : public InterceptedRequestHandler {
     bool is_navigation_ = true;
     bool is_download_ = false;
     CefString request_initiator_;
+    base::Closure unhandled_request_callback_;
 
     // Default values for standard headers.
     std::string accept_language_;
@@ -996,13 +998,14 @@ class InterceptedRequestHandlerWrapper : public InterceptedRequestHandler {
 
       CallHandlerOnComplete(state, status);
 
-      if (status.error_code != 0 && is_external) {
+      if (status.error_code != 0 && status.error_code != ERR_ABORTED &&
+          is_external) {
         bool allow_os_execution = false;
         state->handler_->OnProtocolExecution(
             init_state_->browser_, init_state_->frame_,
             state->pending_request_.get(), allow_os_execution);
-        if (allow_os_execution) {
-          CefBrowserPlatformDelegate::HandleExternalProtocol(request.url);
+        if (allow_os_execution && init_state_->unhandled_request_callback_) {
+          init_state_->unhandled_request_callback_.Run();
         }
       }
     }
@@ -1197,7 +1200,8 @@ void InitOnUIThread(
     scoped_refptr<InterceptedRequestHandlerWrapper::InitHelper> init_helper,
     content::WebContents::Getter web_contents_getter,
     int frame_tree_node_id,
-    const network::ResourceRequest& request) {
+    const network::ResourceRequest& request,
+    const base::Closure& unhandled_request_callback) {
   CEF_REQUIRE_UIT();
 
   // May return nullptr if the WebContents was destroyed while this callback was
@@ -1267,7 +1271,7 @@ void InitOnUIThread(
   init_state->Initialize(browser_context, browserPtr, framePtr,
                          render_process_id, request.render_frame_id,
                          frame_tree_node_id, is_navigation, is_download,
-                         request_initiator);
+                         request_initiator, unhandled_request_callback);
 
   init_helper->MaybeSetInitialized(std::move(init_state));
 }
@@ -1304,7 +1308,8 @@ std::unique_ptr<InterceptedRequestHandler> CreateInterceptedRequestHandler(
       std::make_unique<InterceptedRequestHandlerWrapper::InitState>();
   init_state->Initialize(browser_context, browserPtr, framePtr,
                          render_process_id, render_frame_id, frame_tree_node_id,
-                         is_navigation, is_download, request_initiator);
+                         is_navigation, is_download, request_initiator,
+                         base::Closure());
 
   auto wrapper = std::make_unique<InterceptedRequestHandlerWrapper>();
   wrapper->init_helper()->MaybeSetInitialized(std::move(init_state));
@@ -1315,11 +1320,12 @@ std::unique_ptr<InterceptedRequestHandler> CreateInterceptedRequestHandler(
 std::unique_ptr<InterceptedRequestHandler> CreateInterceptedRequestHandler(
     content::WebContents::Getter web_contents_getter,
     int frame_tree_node_id,
-    const network::ResourceRequest& request) {
+    const network::ResourceRequest& request,
+    const base::Closure& unhandled_request_callback) {
   auto wrapper = std::make_unique<InterceptedRequestHandlerWrapper>();
   CEF_POST_TASK(CEF_UIT, base::BindOnce(InitOnUIThread, wrapper->init_helper(),
                                         web_contents_getter, frame_tree_node_id,
-                                        request));
+                                        request, unhandled_request_callback));
   return wrapper;
 }