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

content/plugin/webplugin_proxy.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_PROXY_H_
 #define CONTENT_PLUGIN_WEBPLUGIN_PROXY_H_
 
 #include <string>
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_cftyperef.h"
 #endif
 #include "base/memory/scoped_handle.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/shared_memory.h"
 #include "base/timer.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 #if defined(USE_X11)
 #include "ui/base/x/x11_util.h"
 #endif
 #include "ui/gl/gpu_preference.h"
 #include "ui/surface/transport_dib.h"
 #include "webkit/plugins/npapi/webplugin.h"
 
-class PluginChannel;
-
 namespace skia {
 class PlatformCanvas;
 }
 
 namespace webkit {
 namespace npapi {
 class WebPluginDelegateImpl;
 }
 }
 
+namespace content {
+class PluginChannel;
+
 #if defined(OS_MACOSX)
 class WebPluginAcceleratedSurfaceProxy;
 #endif
 
 // This is an implementation of WebPlugin that proxies all calls to the
 // renderer.
 class WebPluginProxy : public webkit::npapi::WebPlugin {
  public:
   // Creates a new proxy for WebPlugin, using the given sender to send the
   // marshalled WebPlugin calls.
@@ skipping 250 matching lines @@
 #endif
 
 #endif
 
   // Contains the routing id of the host render view.
   int host_render_view_routing_id_;
 
   base::WeakPtrFactory<WebPluginProxy> weak_factory_;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_PLUGIN_WEBPLUGIN_PROXY_H_