Clean up TCW, make it solely a hub for 1:1 observer/helper objects.

chrome/browser/extensions/extension_tab_helper.cc

 // Copyright (c) 2011 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/extensions/extension_tab_helper.h"
 
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/webstore_inline_installer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/restore_tab_helper.h"
@@ skipping 151 matching lines @@
     const std::string& client_id,
     int return_route_id,
     int callback_id) {
 
   // Check for permission first.
   Profile* profile =
       Profile::FromBrowserContext(tab_contents()->browser_context());
   ExtensionService* extension_service = profile->GetExtensionService();
   extensions::ProcessMap* process_map = extension_service->process_map();
   content::RenderProcessHost* process =
-      tab_contents_wrapper()->render_view_host()->process();
+      tab_contents_wrapper()->tab_contents()->render_view_host()->process();
   const Extension* extension =
       extension_service->GetInstalledApp(requestor_url);
   bool allowed =
       extension &&
       extension->HasAPIPermission(
           ExtensionAPIPermission::kAppNotifications) &&
       process_map->Contains(extension->id(), process->GetID());
   if (!allowed) {
     Send(new ExtensionMsg_GetAppNotifyChannelResponse(
         return_route_id, "", "permission_error", callback_id));
@@ skipping 96 matching lines @@
 }
 
 TabContents* ExtensionTabHelper::GetAssociatedTabContents() const {
   return tab_contents();
 }
 
 gfx::NativeView ExtensionTabHelper::GetNativeViewOfHost() {
   RenderWidgetHostView* rwhv = tab_contents()->GetRenderWidgetHostView();
   return rwhv ? rwhv->GetNativeView() : NULL;
 }