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

content/common/npobject_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.
 //
 // A class that receives IPC messages from an NPObjectProxy and calls the real
 // NPObject.
 
 #ifndef CONTENT_COMMON_NPOBJECT_STUB_H_
 #define CONTENT_COMMON_NPOBJECT_STUB_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/npobject_base.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "ui/gfx/native_widget_types.h"
 
+struct NPObject;
+
+namespace content {
 class NPChannelBase;
 struct NPIdentifier_Param;
-struct NPObject;
 struct NPVariant_Param;
 
 // This wraps an NPObject and converts IPC messages from NPObjectProxy to calls
 // to the object.  The results are marshalled back.  See npobject_proxy.h for
 // more information.
 class NPObjectStub : public IPC::Listener,
                      public IPC::Sender,
                      public base::SupportsWeakPtr<NPObjectStub>,
                      public NPObjectBase {
  public:
@@ skipping 52 matching lines @@
  private:
   NPObject* npobject_;
   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_STUB_H_