Add a unified resource tracker shared between the proxy and the impl.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

Index: webkit/plugins/ppapi/ppapi_plugin_instance.cc
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.cc b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
index 4af282964089a370ba2635308dab0c66ea00b8dc..e1c714f780ddccc9ae4f0672fe527097125510be 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.cc
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
@@ -454,7 +454,6 @@ bool PluginInstance::HandleInputEvent(const WebKit::WebInputEvent& event,
       CreateInputEventData(event, &events);
 
       // Each input event may generate more than one PP_InputEvent.
-      ResourceTracker* tracker = ResourceTracker::Get();
       for (size_t i = 0; i < events.size(); i++) {
         if (filtered_input_event_mask_ & event_class)
           events[i].is_filtered = true;
@@ -462,13 +461,10 @@ bool PluginInstance::HandleInputEvent(const WebKit::WebInputEvent& event,
           rv = true;  // Unfiltered events are assumed to be handled.
         scoped_refptr<PPB_InputEvent_Impl> event_resource(
             new PPB_InputEvent_Impl(this, events[i]));
-        PP_Resource resource = event_resource->GetReference();
+        Resource::ScopedResourceId resource_id(event_resource.get());
 
         rv |= PP_ToBool(plugin_input_event_interface_->HandleInputEvent(
-            pp_instance(), event_resource->GetReference()));
-
-        // Release the reference we took above.
-        tracker->UnrefResource(resource);
+            pp_instance(), resource_id.id));
       }
     }
   }