Move Renderer-side NPObject owner tracking to JavaBridgeChannel.

content/browser/renderer_host/java/java_bridge_channel_host.h

Index: content/browser/renderer_host/java/java_bridge_channel_host.h
diff --git a/content/browser/renderer_host/java/java_bridge_channel_host.h b/content/browser/renderer_host/java/java_bridge_channel_host.h
index 2f54259aec5160b66306b6cd8646a66320e4a71c..07850503fb975f18e991b480b3ea0ac42a831e90 100644
--- a/content/browser/renderer_host/java/java_bridge_channel_host.h
+++ b/content/browser/renderer_host/java/java_bridge_channel_host.h
@@ -33,8 +33,8 @@ class JavaBridgeChannelHost : public NPChannelBase {
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
 
  private:
-  JavaBridgeChannelHost() {}
   friend class base::RefCountedThreadSafe<JavaBridgeChannelHost>;
+  JavaBridgeChannelHost();
   virtual ~JavaBridgeChannelHost();
 
   static NPChannelBase* ClassFactory() {
@@ -44,6 +44,9 @@ class JavaBridgeChannelHost : public NPChannelBase {
   // Message handlers
   void OnGenerateRouteID(int* route_id);
 
+  // Dummy NPObject owner Id used to track objects received from the Renderer.
+  scoped_ptr<struct _NPP> peer_owner_id_;
+
   DISALLOW_COPY_AND_ASSIGN(JavaBridgeChannelHost);
 };