PPAPI: Make PPB_MessageLoop_Dev::GetForMainThread work

ppapi/proxy/plugin_globals.cc

 // 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.
 
 #include "ppapi/proxy/plugin_globals.h"
 
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_proxy_delegate.h"
+#include "ppapi/proxy/ppb_message_loop_proxy.h"
 #include "ppapi/thunk/enter.h"
 
 namespace ppapi {
 namespace proxy {
 
 PluginGlobals* PluginGlobals::plugin_globals_ = NULL;
 
 PluginGlobals::PluginGlobals()
     : ppapi::PpapiGlobals(),
       plugin_proxy_delegate_(NULL),
-      callback_tracker_(new CallbackTracker) {
+      callback_tracker_(new CallbackTracker),
+      loop_for_main_thread_(
+          new MessageLoopResource(MessageLoopResource::ForMainThread())) {
   DCHECK(!plugin_globals_);
   plugin_globals_ = this;
 }
 
 PluginGlobals::PluginGlobals(ForTest for_test)
     : ppapi::PpapiGlobals(for_test),
       plugin_proxy_delegate_(NULL),
       callback_tracker_(new CallbackTracker) {
   DCHECK(!plugin_globals_);
 }
@@ skipping 11 matching lines @@
   return &plugin_var_tracker_;
 }
 
 CallbackTracker* PluginGlobals::GetCallbackTrackerForInstance(
     PP_Instance instance) {
   // In the plugin process, the callback tracker is always the same, regardless
   // of the instance.
   return callback_tracker_.get();
 }
 
+MessageLoopResource* PluginGlobals::loop_for_main_thread() {
+  return loop_for_main_thread_.get();
+}
+
 thunk::PPB_Instance_API* PluginGlobals::GetInstanceAPI(PP_Instance instance) {
   PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
   if (dispatcher)
     return dispatcher->GetInstanceAPI();
   return NULL;
 }
 
 thunk::ResourceCreationAPI* PluginGlobals::GetResourceCreationAPI(
     PP_Instance instance) {
   PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
@@ skipping 40 matching lines @@
   // for the "instance = 0" case.
   LogWithSource(0, level, source, value);
 }
 
 bool PluginGlobals::IsPluginGlobals() const {
   return true;
 }
 
 }  // namespace proxy
 }  // namespace ppapi