Make <webview> use out-of-process iframe architecture.

extensions/renderer/guest_view/extensions_guest_view_container.cc

 // Copyright 2014 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 "extensions/renderer/guest_view/extensions_guest_view_container.h"
 
+#include "base/command_line.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/renderer/render_frame.h"
+#include "extensions/common/guest_view/extensions_guest_view_messages.h"
 #include "third_party/WebKit/public/web/WebScopedMicrotaskSuppression.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace extensions {
 
 ExtensionsGuestViewContainer::ExtensionsGuestViewContainer(
     content::RenderFrame* render_frame)
     : GuestViewContainer(render_frame),
       destruction_isolate_(nullptr),
       element_resize_isolate_(nullptr),
       weak_ptr_factory_(this) {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSitePerProcess)) {
+    // There is no BrowserPluginDelegate to wait for.
+    ready_ = true;
+  }
 }
 
 ExtensionsGuestViewContainer::~ExtensionsGuestViewContainer() {
   // Call the destruction callback, if one is registered.
   if (!destruction_callback_.IsEmpty()) {
     v8::HandleScope handle_scope(destruction_isolate_);
     v8::Local<v8::Function> callback = v8::Local<v8::Function>::New(
         destruction_isolate_, destruction_callback_);
     v8::Local<v8::Context> context = callback->CreationContext();
     if (context.IsEmpty())
       return;
 
     v8::Context::Scope context_scope(context);
     blink::WebScopedMicrotaskSuppression suppression;
 
     callback->Call(context->Global(), 0 /* argc */, nullptr);
   }
 }
 
 void ExtensionsGuestViewContainer::RegisterDestructionCallback(
     v8::Local<v8::Function> callback,
     v8::Isolate* isolate) {
   destruction_callback_.Reset(isolate, callback);
   destruction_isolate_ = isolate;
 }
 
+bool ExtensionsGuestViewContainer::OnMessage(const IPC::Message& message) {

[Fady Samuel, 2015/05/26 19:02:28]

Move this code to GuestViewContainer.

+  if (message.type() != ExtensionsGuestViewMsg_GuestReady::ID)
+    return false;
+
+  OnHandleCallback(message);
+  return true;
+}
+
 void ExtensionsGuestViewContainer::RegisterElementResizeCallback(
     v8::Local<v8::Function> callback,
     v8::Isolate* isolate) {
   element_resize_callback_.Reset(isolate, callback);
   element_resize_isolate_ = isolate;
 }
 
 void ExtensionsGuestViewContainer::DidResizeElement(const gfx::Size& old_size,
                                                     const gfx::Size& new_size) {
   // Call the element resize callback, if one is registered.
@@ skipping 23 matching lines @@
       v8::Integer::New(element_resize_isolate_, new_size.width()),
       v8::Integer::New(element_resize_isolate_, new_size.height())};
 
   v8::Context::Scope context_scope(context);
   blink::WebScopedMicrotaskSuppression suppression;
 
   callback->Call(context->Global(), argc, argv);
 }
 
 }  // namespace extensions