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

chrome/browser/extensions/extension_function.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_H_
 #pragma once
 
 #include <list>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process.h"
 #include "chrome/browser/extensions/extension_info_map.h"
 #include "chrome/common/extensions/extension.h"
-#include "content/browser/renderer_host/render_view_host_observer.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/render_view_host_observer.h"
 #include "ipc/ipc_message.h"
 
 class Browser;
 class ChromeRenderMessageFilter;
 class ExtensionFunction;
 class ExtensionFunctionDispatcher;
 class UIThreadExtensionFunction;
 class IOThreadExtensionFunction;
 class Profile;
 class QuotaLimitHeuristic;
@@ skipping 249 matching lines @@
 
  private:
   // Helper class to track the lifetime of ExtensionFunction's RenderViewHost
   // pointer and NULL it out when it dies. It also allows us to filter IPC
   // messages comming from the RenderViewHost. We use this separate class
   // (instead of implementing NotificationObserver on ExtensionFunction) because
   // it is/ common for subclasses of ExtensionFunction to be
   // NotificationObservers, and it would be an easy error to forget to call the
   // base class's Observe() method.
   class RenderViewHostTracker : public content::NotificationObserver,
-                                public RenderViewHostObserver {
+                                public content::RenderViewHostObserver {
    public:
     RenderViewHostTracker(UIThreadExtensionFunction* function,
                           RenderViewHost* render_view_host);
    private:
     virtual void Observe(int type,
                          const content::NotificationSource& source,
                          const content::NotificationDetails& details) OVERRIDE;
 
     virtual void RenderViewHostDestroyed(
         RenderViewHost* render_view_host) OVERRIDE;
@@ skipping 92 matching lines @@
  public:
   SyncIOThreadExtensionFunction();
 
   virtual void Run() OVERRIDE;
 
  protected:
   virtual ~SyncIOThreadExtensionFunction();
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_H_