Move the remaning files in content\common to the content namespace.

content/common/npobject_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.
 //
 // A proxy for NPObject that sends all calls to the object to an NPObjectStub
 // running in a different process.
 
 #ifndef CONTENT_COMMON_NPOBJECT_PROXY_H_
 #define CONTENT_COMMON_NPOBJECT_PROXY_H_
 
 #include "base/memory/ref_counted.h"
 #include "content/common/npobject_base.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/npapi/bindings/npruntime.h"
 #include "ui/gfx/native_widget_types.h"
 
+struct NPObject;
+
+namespace content {
 class NPChannelBase;
-struct NPObject;
 
 // When running a plugin in a different process from the renderer, we need to
 // proxy calls to NPObjects across process boundaries.  This happens both ways,
 // as a plugin can get an NPObject for the window, and a page can get an
 // NPObject for the plugin.  In the process that interacts with the NPobject we
 // give it an NPObjectProxy instead.  All calls to it are sent across an IPC
 // channel (specifically, a NPChannelBase).  The NPObjectStub on the other
 // side translates the IPC messages into calls to the actual NPObject, and
 // returns the marshalled result.
 class NPObjectProxy : public IPC::Listener,
@@ skipping 82 matching lines @@
   static NPClass npclass_proxy_;
 
   scoped_refptr<NPChannelBase> channel_;
   int route_id_;
   gfx::NativeViewId containing_window_;
 
   // The url of the main frame hosting the plugin.
   GURL page_url_;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_COMMON_NPOBJECT_PROXY_H_