Move c/r/extensions/* into extensions namespace

chrome/renderer/extensions/app_window_custom_bindings.h

 // Copyright (c) 2012 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_RENDERER_EXTENSIONS_APP_WINDOW_CUSTOM_BINDINGS_H_
 #define CHROME_RENDERER_EXTENSIONS_APP_WINDOW_CUSTOM_BINDINGS_H_
 
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 
-class ExtensionDispatcher;
-
 namespace extensions {
+class Dispatcher;
 
 // Implements custom bindings for the app.window API.
 class AppWindowCustomBindings : public ChromeV8Extension {
  public:
-  explicit AppWindowCustomBindings(ExtensionDispatcher* extension_dispatcher);
+  explicit AppWindowCustomBindings(Dispatcher* dispatcher);
 
  private:
   static v8::Handle<v8::Value> GetView(const v8::Arguments& args);
 
   DISALLOW_COPY_AND_ASSIGN(AppWindowCustomBindings);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_APP_WINDOW_CUSTOM_BINDINGS_H_