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

content/public/browser/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 "content/browser/renderer_host/render_view_host_observer.h"
+#include "content/public/browser/render_view_host_observer.h"
 
 #include "content/browser/renderer_host/render_view_host.h"
 
+namespace content {
+
 RenderViewHostObserver::RenderViewHostObserver(RenderViewHost* render_view_host)
     : render_view_host_(render_view_host),
       routing_id_(render_view_host->routing_id()) {
   render_view_host_->AddObserver(this);
 }
 
 RenderViewHostObserver::~RenderViewHostObserver() {
   if (render_view_host_)
     render_view_host_->RemoveObserver(this);
 }
@@ skipping 20 matching lines @@
 
   return render_view_host_->Send(message);
 }
 
 void RenderViewHostObserver::RenderViewHostDestruction() {
   render_view_host_->RemoveObserver(this);
   RenderViewHost* rvh = render_view_host_;
   render_view_host_ = NULL;
   RenderViewHostDestroyed(rvh);
 }
+
+}  // namespace content