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/alloy/browser_platform_delegate_alloy.cc

@@ -12,6 +12,7 @@
 #include "libcef/browser/extensions/extension_web_contents_observer.h"
 #include "libcef/browser/printing/print_view_manager.h"
 #include "libcef/common/extensions/extensions_util.h"
+#include "libcef/features/runtime_checks.h"
 
 #include "base/logging.h"
 #include "chrome/browser/printing/print_view_manager.h"
@@ -28,8 +29,11 @@ CefBrowserPlatformDelegateAlloy::CefBrowserPlatformDelegateAlloy()
     : weak_ptr_factory_(this) {}
 
 content::WebContents* CefBrowserPlatformDelegateAlloy::CreateWebContents(
-    CefBrowserHostBase::CreateParams& create_params,
+    CefBrowserCreateParams& create_params,
     bool& own_web_contents) {
+  REQUIRE_ALLOY_RUNTIME();
+  DCHECK(primary_);
+
   // Get or create the request context and browser context.
   CefRefPtr<CefRequestContextImpl> request_context_impl =
       CefRequestContextImpl::GetOrCreateForRequestContext(
@@ -105,6 +109,9 @@ void CefBrowserPlatformDelegateAlloy::AddNewContents(
     const gfx::Rect& initial_rect,
     bool user_gesture,
     bool* was_blocked) {
+  REQUIRE_ALLOY_RUNTIME();
+  DCHECK(primary_);
+
   CefRefPtr<AlloyBrowserHostImpl> owner =
       AlloyBrowserHostImpl::GetBrowserForContents(new_contents.get());
   if (owner) {
@@ -143,10 +150,15 @@ void CefBrowserPlatformDelegateAlloy::RenderViewReady() {
 }
 
 void CefBrowserPlatformDelegateAlloy::BrowserCreated(
-    AlloyBrowserHostImpl* browser) {
+    CefBrowserHostBase* browser) {
   CefBrowserPlatformDelegate::BrowserCreated(browser);
 
-  web_contents_->SetDelegate(browser);
+  // Only register WebContents delegate/observers if we're the primary delegate.
+  if (!primary_)
+    return;
+
+  DCHECK(!web_contents_->GetDelegate());
+  web_contents_->SetDelegate(static_cast<AlloyBrowserHostImpl*>(browser));
 
   PrefsTabHelper::CreateForWebContents(web_contents_);
   printing::CefPrintViewManager::CreateForWebContents(web_contents_);
@@ -169,24 +181,29 @@ void CefBrowserPlatformDelegateAlloy::CreateExtensionHost(
     const extensions::Extension* extension,
     const GURL& url,
     extensions::ViewType host_type) {
+  REQUIRE_ALLOY_RUNTIME();
+  DCHECK(primary_);
+
   // Should get WebContentsCreated and BrowserCreated calls first.
   DCHECK(web_contents_);
   DCHECK(browser_);
   DCHECK(!extension_host_);
 
+  auto alloy_browser = static_cast<AlloyBrowserHostImpl*>(browser_);
+
   if (host_type == extensions::VIEW_TYPE_EXTENSION_DIALOG ||
       host_type == extensions::VIEW_TYPE_EXTENSION_POPUP) {
     // Create an extension host that we own.
     extension_host_ = new extensions::CefExtensionViewHost(
-        browser_, extension, web_contents_, url, host_type);
+        alloy_browser, extension, web_contents_, url, host_type);
     // Trigger load of the extension URL.
     extension_host_->CreateRenderViewSoon();
   } else if (host_type == extensions::VIEW_TYPE_EXTENSION_BACKGROUND_PAGE) {
     is_background_host_ = true;
-    browser_->is_background_host_ = true;
+    alloy_browser->is_background_host_ = true;
     // Create an extension host that will be owned by ProcessManager.
     extension_host_ = new extensions::CefExtensionBackgroundHost(
-        browser_,
+        alloy_browser,
         base::BindOnce(&CefBrowserPlatformDelegateAlloy::OnExtensionHostDeleted,
                        weak_ptr_factory_.GetWeakPtr()),
         extension, web_contents_, url, host_type);
@@ -202,9 +219,11 @@ extensions::ExtensionHost* CefBrowserPlatformDelegateAlloy::GetExtensionHost()
 }
 
 void CefBrowserPlatformDelegateAlloy::BrowserDestroyed(
-    AlloyBrowserHostImpl* browser) {
-  DestroyExtensionHost();
-  owned_web_contents_.reset();
+    CefBrowserHostBase* browser) {
+  if (primary_) {
+    DestroyExtensionHost();
+    owned_web_contents_.reset();
+  }
 
   CefBrowserPlatformDelegate::BrowserDestroyed(browser);
 }
@@ -303,6 +322,8 @@ void CefBrowserPlatformDelegateAlloy::SetAccessibilityState(
 }
 
 bool CefBrowserPlatformDelegateAlloy::IsPrintPreviewSupported() const {
+  REQUIRE_ALLOY_RUNTIME();
+
   auto actionable_contents = GetActionableWebContents();
   if (!actionable_contents)
     return false;
@@ -318,6 +339,8 @@ bool CefBrowserPlatformDelegateAlloy::IsPrintPreviewSupported() const {
 }
 
 void CefBrowserPlatformDelegateAlloy::Print() {
+  REQUIRE_ALLOY_RUNTIME();
+
   auto actionable_contents = GetActionableWebContents();
   if (!actionable_contents)
     return;
@@ -337,6 +360,8 @@ void CefBrowserPlatformDelegateAlloy::PrintToPDF(
     const CefString& path,
     const CefPdfPrintSettings& settings,
     CefRefPtr<CefPdfPrintCallback> callback) {
+  REQUIRE_ALLOY_RUNTIME();
+
   content::WebContents* actionable_contents = GetActionableWebContents();
   if (!actionable_contents)
     return;
@@ -405,6 +430,8 @@ CefBrowserPlatformDelegateAlloy::GetActionableWebContents() const {
 
 void CefBrowserPlatformDelegateAlloy::SetOwnedWebContents(
     content::WebContents* owned_contents) {
+  DCHECK(primary_);
+
   // Should not currently own a WebContents.
   CHECK(!owned_web_contents_);
   owned_web_contents_.reset(owned_contents);