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

content/plugin/webplugin_delegate_stub.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_DELEGATE_STUB_H_
 #define CONTENT_PLUGIN_WEBPLUGIN_DELEGATE_STUB_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "content/common/npobject_stub.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/npapi/bindings/npapi.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 
-class PluginChannel;
-class WebPluginProxy;
 struct PluginMsg_Init_Params;
 struct PluginMsg_DidReceiveResponseParams;
 struct PluginMsg_UpdateGeometry_Param;
 class WebCursor;
 
 namespace WebKit {
 class WebInputEvent;
 }
 
 namespace webkit {
 namespace npapi {
 class WebPluginDelegateImpl;
 }
 }
 
+namespace content {
+class PluginChannel;
+class WebPluginProxy;
+
 // Converts the IPC messages from WebPluginDelegateProxy into calls to the
 // actual WebPluginDelegateImpl object.
 class WebPluginDelegateStub : public IPC::Listener,
                               public IPC::Sender,
                               public base::RefCounted<WebPluginDelegateStub> {
  public:
   WebPluginDelegateStub(const std::string& mime_type, int instance_id,
                         PluginChannel* channel);
 
   // IPC::Listener implementation:
@@ skipping 80 matching lines @@
   // If this is a GPU-accelerated plug-in, we need to be able to receive a fake
   // window handle which is used for subsequent communication back to the
   // browser.
   void OnSetFakeAcceleratedSurfaceWindowHandle(gfx::PluginWindowHandle window);
 #endif
 #endif
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebPluginDelegateStub);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_PLUGIN_WEBPLUGIN_DELEGATE_STUB_H_