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

content/browser/debugger/render_view_devtools_agent_host.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/debugger/render_view_devtools_agent_host.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "content/browser/debugger/devtools_manager.h"
 #include "content/browser/debugger/render_view_devtools_agent_host.h"
@@ skipping 32 matching lines @@
        it != g_instances.Get().end(); ++it) {
     if (it->first->delegate() != delegate)
       continue;
     if (devtools_manager->GetDevToolsClientHostFor(it->second))
       return true;
   }
   return false;
 }
 
 RenderViewDevToolsAgentHost::RenderViewDevToolsAgentHost(RenderViewHost* rvh)
-    : RenderViewHostObserver(rvh),
+    : content::RenderViewHostObserver(rvh),
       render_view_host_(rvh) {
   g_instances.Get()[rvh] = this;
 }
 
 void RenderViewDevToolsAgentHost::SendMessageToAgent(IPC::Message* msg) {
   msg->set_routing_id(render_view_host_->routing_id());
   render_view_host_->Send(msg);
 }
 
 void RenderViewDevToolsAgentHost::NotifyClientClosing() {
@@ skipping 45 matching lines @@
 }
 
 void RenderViewDevToolsAgentHost::OnClearBrowserCache() {
   content::GetContentClient()->browser()->ClearCache(render_view_host_);
 }
 
 void RenderViewDevToolsAgentHost::OnClearBrowserCookies() {
   content::GetContentClient()->browser()->ClearCookies(render_view_host_);
 }