Give the main frame a RenderWidget.

chrome/browser/background/background_contents.cc

 // 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 "chrome/browser/background/background_contents.h"
 
 #include "base/profiler/scoped_tracker.h"
 #include "chrome/browser/background/background_contents_service.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
@@ skipping 12 matching lines @@
 #include "extensions/browser/extension_host_queue.h"
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/browser/view_type_utils.h"
 #include "ui/gfx/geometry/rect.h"
 
 using content::SiteInstance;
 using content::WebContents;
 
 BackgroundContents::BackgroundContents(
     SiteInstance* site_instance,
-    int routing_id,
-    int main_frame_routing_id,
+    int32_t routing_id,
+    int32_t main_frame_routing_id,
+    int32_t main_frame_widget_routing_id,
     Delegate* delegate,
     const std::string& partition_id,
     content::SessionStorageNamespace* session_storage_namespace)
     : delegate_(delegate),
       extension_host_delegate_(extensions::ExtensionsBrowserClient::Get()
                                    ->CreateExtensionHostDelegate()) {
   profile_ = Profile::FromBrowserContext(
       site_instance->GetBrowserContext());
 
   WebContents::CreateParams create_params(profile_, site_instance);
   create_params.routing_id = routing_id;
   create_params.main_frame_routing_id = main_frame_routing_id;
+  create_params.main_frame_widget_routing_id = main_frame_widget_routing_id;
   create_params.renderer_initiated_creation = routing_id != MSG_ROUTING_NONE;
   if (session_storage_namespace) {
     content::SessionStorageNamespaceMap session_storage_namespace_map;
     session_storage_namespace_map.insert(
         std::make_pair(partition_id, session_storage_namespace));
     web_contents_.reset(WebContents::CreateWithSessionStorage(
         create_params, session_storage_namespace_map));
   } else {
     web_contents_.reset(WebContents::Create(create_params));
   }
@@ skipping 155 matching lines @@
 
 void BackgroundContents::AddDeferredStartRenderHostObserver(
     extensions::DeferredStartRenderHostObserver* observer) {
   deferred_start_render_host_observer_list_.AddObserver(observer);
 }
 
 void BackgroundContents::RemoveDeferredStartRenderHostObserver(
     extensions::DeferredStartRenderHostObserver* observer) {
   deferred_start_render_host_observer_list_.RemoveObserver(observer);
 }