Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/extensions/extension_message_handler.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/extensions/extension_message_handler.h"
 
 #include "chrome/browser/extensions/extension_message_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "content/browser/renderer_host/render_view_host.h"
@@ skipping 13 matching lines @@
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ExtensionMessageHandler, message)
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_PostMessage, OnPostMessage)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void ExtensionMessageHandler::RenderViewHostInitialized() {
   Send(new ExtensionMsg_NotifyRenderViewType(
-      routing_id(), render_view_host()->delegate()->GetRenderViewType()));
+      routing_id(), render_view_host()->GetDelegate()->GetRenderViewType()));
 }
 
 void ExtensionMessageHandler::OnPostMessage(int port_id,
                                             const std::string& message) {
   Profile* profile = Profile::FromBrowserContext(
-      render_view_host()->process()->GetBrowserContext());
+      render_view_host()->GetProcess()->GetBrowserContext());
   if (profile->GetExtensionMessageService()) {
     profile->GetExtensionMessageService()->PostMessageFromRenderer(
         port_id, message);
   }
 }