Move content's a plugin, ppapi_plugin, utility, and worker subdirectories to the content namespace.

content/plugin/webplugin_accelerated_surface_proxy_mac.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 CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_
 #define CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_
 
 #include "base/compiler_specific.h"
 #include "ui/gl/gpu_preference.h"
 #include "webkit/plugins/npapi/webplugin_accelerated_surface_mac.h"
 
+class AcceleratedSurface;
+
+namespace content {
 class WebPluginProxy;
-class AcceleratedSurface;
 
 // Out-of-process implementation of WebPluginAcceleratedSurface that proxies
 // calls through a WebPluginProxy.
 class WebPluginAcceleratedSurfaceProxy
     : public webkit::npapi::WebPluginAcceleratedSurface {
  public:
   // Creates a new WebPluginAcceleratedSurfaceProxy that uses plugin_proxy
   // to proxy calls. plugin_proxy must outlive this object. Returns NULL if
   // initialization fails.
   static WebPluginAcceleratedSurfaceProxy* Create(
@@ skipping 16 matching lines @@
                                    bool composited);
 
   WebPluginProxy* plugin_proxy_;  // Weak ref.
   gfx::PluginWindowHandle window_handle_;
   AcceleratedSurface* surface_;
   bool composited_;
 
   DISALLOW_COPY_AND_ASSIGN(WebPluginAcceleratedSurfaceProxy);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_