Move Renderer-side NPObject owner tracking to JavaBridgeChannel.

content/renderer/java/java_bridge_channel.h

Index: content/renderer/java/java_bridge_channel.h
diff --git a/content/renderer/java/java_bridge_channel.h b/content/renderer/java/java_bridge_channel.h
index dbedceecf310801feb105d2c32f0dd1963dcd7ab..324a3a285b636918ca0a327eb7bb299414b3eff7 100644
--- a/content/renderer/java/java_bridge_channel.h
+++ b/content/renderer/java/java_bridge_channel.h
@@ -5,6 +5,7 @@
 #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"
 
@@ -30,6 +31,10 @@ class JavaBridgeChannel : public content::NPChannelBase {
 
   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);
 };