Move Renderer-side NPObject owner tracking to JavaBridgeChannel.

content/renderer/java/java_bridge_channel.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_RENDERER_JAVA_JAVA_BRIDGE_CHANNEL_H_
 #define CONTENT_RENDERER_JAVA_JAVA_BRIDGE_CHANNEL_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "content/child/np_channel_base.h"
 #include "ipc/ipc_channel_handle.h"
 
 namespace content {
 
 class JavaBridgeChannel : public content::NPChannelBase {
  public:
   // The return value may be null.
   static JavaBridgeChannel* GetJavaBridgeChannel(
       const IPC::ChannelHandle& channel_handle,
       base::MessageLoopProxy* ipc_message_loop);
 
   // NPChannelBase implementation:
   virtual int GenerateRouteID() OVERRIDE;
 
   // NPChannelBase override:
   virtual bool OnControlMessageReceived(const IPC::Message& msg) OVERRIDE;
 
  private:
   JavaBridgeChannel();
   // This class is ref-counted.
   virtual ~JavaBridgeChannel();
 
   static NPChannelBase* ClassFactory() { return new JavaBridgeChannel(); }
 
+  // Dummy NPObject owner Id used to track objects owned by the JavaBridge
+  // peer in the Browser process.
+  scoped_ptr<struct _NPP> peer_owner_id_;
+
   DISALLOW_COPY_AND_ASSIGN(JavaBridgeChannel);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_JAVA_JAVA_BRIDGE_CHANNEL_H_