[PPAPI] ResourceVar now reference counts its PP_Resource in the plugin.

ppapi/proxy/plugin_var_tracker.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 PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_
 #define PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 41 matching lines @@
 
   PluginDispatcher* DispatcherForPluginObject(
       const PP_Var& plugin_object) const;
 
   // Like Release() but the var is identified by its host object ID (as
   // returned by GetHostObject).
   void ReleaseHostObject(PluginDispatcher* dispatcher,
                          const PP_Var& host_object);
 
   // VarTracker public overrides.
+  virtual ResourceVar* MakeResourceVar(PP_Resource pp_resource) OVERRIDE;
   virtual void DidDeleteInstance(PP_Instance instance) OVERRIDE;
   virtual int TrackSharedMemoryHandle(PP_Instance instance,
                                       base::SharedMemoryHandle file,
                                       uint32 size_in_bytes) OVERRIDE;
   virtual bool StopTrackingSharedMemoryHandle(int id,
                                               PP_Instance instance,
                                               base::SharedMemoryHandle* handle,
                                               uint32* size_in_bytes) OVERRIDE;
 
   // Notification that a plugin-implemented object (PPP_Class) was created by
@@ skipping 124 matching lines @@
       UserDataToPluginImplementedVarMap;
   UserDataToPluginImplementedVarMap user_data_to_plugin_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginVarTracker);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PLUGIN_VAR_TRACKER_H_