Get rid of temporary render_view_host.h.

content/browser/tab_contents/tab_contents_observer.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 "content/browser/tab_contents/tab_contents_observer.h"
 
-#include "chrome/browser/renderer_host/render_view_host.h"
+#include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 
 TabContentsObserver::TabContentsObserver(TabContents* tab_contents)
     : tab_contents_(tab_contents),
       routing_id_(tab_contents->render_view_host()->routing_id()) {
   tab_contents_->AddObserver(this);
 }
 
 TabContentsObserver::~TabContentsObserver() {
   if (tab_contents_)
     tab_contents_->RemoveObserver(this);
 }
 
 bool TabContentsObserver::OnMessageReceived(const IPC::Message& message) {
   return false;
 }
 
 bool TabContentsObserver::Send(IPC::Message* message) {
   if (!tab_contents_->render_view_host()) {
     delete message;
     return false;
   }
 
   return tab_contents_->render_view_host()->Send(message);
 }