Merge the plugin and impl side of the audio config and input event resources.

ppapi/proxy/plugin_resource_tracker.cc

Index: ppapi/proxy/plugin_resource_tracker.cc
diff --git a/ppapi/proxy/plugin_resource_tracker.cc b/ppapi/proxy/plugin_resource_tracker.cc
index 9f19d25851f521a04e39d0156733d22689cbbb8b..e47c35e0ca6b20f6db71bec18f2a92b403d63963 100644
--- a/ppapi/proxy/plugin_resource_tracker.cc
+++ b/ppapi/proxy/plugin_resource_tracker.cc
@@ -75,6 +75,11 @@ ResourceTracker* PluginResourceTracker::GetResourceTracker() {
   return this;
 }
 
+PP_Module PluginResourceTracker::GetModuleForInstance(PP_Instance instance) {
+  // Currently proxied plugins don't use the PP_Module for anything useful.
+  return 0;
+}
+
 PP_Resource PluginResourceTracker::AddResource(Resource* object) {
   PP_Resource ret = ResourceTracker::AddResource(object);