Move RenderViewHostObserver to content/public/browser/ and put it into the content namespace.

chrome/browser/prerender/prerender_render_view_host_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 "chrome/browser/prerender/prerender_render_view_host_observer.h"
 
 #include "chrome/browser/prerender/prerender_contents.h"
 #include "chrome/common/icon_messages.h"
 #include "chrome/common/render_messages.h"
 
 namespace prerender {
 
 PrerenderRenderViewHostObserver::PrerenderRenderViewHostObserver(
     PrerenderContents* prerender_contents,
     RenderViewHost* render_view_host)
-    : RenderViewHostObserver(render_view_host),
+    : content::RenderViewHostObserver(render_view_host),
       prerender_contents_(prerender_contents) {
 }
 
 void PrerenderRenderViewHostObserver::RenderViewHostDestroyed(
     RenderViewHost* rvh) {
   // The base class deletes |this| on RenderViewHost destruction but we want the
   // lifetime to be tied to the PrerenderContents instead, so we'll do nothing
   // here.
 }
 
 bool PrerenderRenderViewHostObserver::OnMessageReceived(
     const IPC::Message& message) {
   if (!prerender_contents_)
-    return RenderViewHostObserver::OnMessageReceived(message);
+    return content::RenderViewHostObserver::OnMessageReceived(message);
 
   bool handled = true;
   // The following messages we do want to consume.
   IPC_BEGIN_MESSAGE_MAP(PrerenderRenderViewHostObserver, message)
     IPC_MESSAGE_HANDLER(IconHostMsg_UpdateFaviconURL, OnUpdateFaviconURL)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_MaybeCancelPrerenderForHTML5Media,
                         OnMaybeCancelPrerenderForHTML5Media)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_CancelPrerenderForPrinting,
                         OnCancelPrerenderForPrinting)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   // Pass the message through.
   if (!handled)
-    handled = RenderViewHostObserver::OnMessageReceived(message);
+    handled = content::RenderViewHostObserver::OnMessageReceived(message);
 
   return handled;
 }
 
 // The base class declares this as protected so this is just here to make it
 // public so it is visible to the caller.
 bool PrerenderRenderViewHostObserver::Send(IPC::Message* message) {
-  return RenderViewHostObserver::Send(message);
+  return content::RenderViewHostObserver::Send(message);
 }
 
 void PrerenderRenderViewHostObserver::OnUpdateFaviconURL(
     int32 page_id,
     const std::vector<FaviconURL>& urls) {
   prerender_contents_->OnUpdateFaviconURL(page_id, urls);
 }
 
 void PrerenderRenderViewHostObserver::OnMaybeCancelPrerenderForHTML5Media() {
   prerender_contents_->Destroy(FINAL_STATUS_HTML5_MEDIA);
 }
 
 void PrerenderRenderViewHostObserver::OnCancelPrerenderForPrinting() {
   prerender_contents_->Destroy(FINAL_STATUS_WINDOW_PRINT);
 }
 
 }