Support using TrackedCallbacks as hints to determine the handling thread of resource reply messages

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 "base/task_runner.h"
 #include "base/threading/thread.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_sender.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_proxy_delegate.h"
 #include "ppapi/proxy/ppb_message_loop_proxy.h"
+#include "ppapi/proxy/resource_reply_thread_registrar.h"
 #include "ppapi/shared_impl/proxy_lock.h"
 #include "ppapi/thunk/enter.h"
 
 namespace ppapi {
 namespace proxy {
 
 // It performs necessary locking/unlocking of the proxy lock, and forwards all
 // messages to the underlying sender.
 class PluginGlobals::BrowserSender : public IPC::Sender {
  public:
@@ skipping 20 matching lines @@
   IPC::Sender* underlying_sender_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserSender);
 };
 
 PluginGlobals* PluginGlobals::plugin_globals_ = NULL;
 
 PluginGlobals::PluginGlobals()
     : ppapi::PpapiGlobals(),
       plugin_proxy_delegate_(NULL),
-      callback_tracker_(new CallbackTracker) {
+      callback_tracker_(new CallbackTracker),
+      resource_reply_thread_registrar_(
+          new ResourceReplyThreadRegistrar(GetMainThreadMessageLoop())) {
   DCHECK(!plugin_globals_);
   plugin_globals_ = this;
 
   // ResourceTracker asserts that we have the lock when we add new resources,
   // so we lock when creating the MessageLoopResource even though there is no
   // chance of race conditions.
   ProxyAutoLock lock;
   loop_for_main_thread_ =
       new MessageLoopResource(MessageLoopResource::ForMainThread());
 }
 
 PluginGlobals::PluginGlobals(PerThreadForTest per_thread_for_test)
     : ppapi::PpapiGlobals(per_thread_for_test),
       plugin_proxy_delegate_(NULL),
-      callback_tracker_(new CallbackTracker) {
+      callback_tracker_(new CallbackTracker),
+      resource_reply_thread_registrar_(
+          new ResourceReplyThreadRegistrar(GetMainThreadMessageLoop())) {
   DCHECK(!plugin_globals_);
 }
 
 PluginGlobals::~PluginGlobals() {
   DCHECK(plugin_globals_ == this || !plugin_globals_);
   {
     ProxyAutoLock lock;
     // Release the main-thread message loop. We should have the last reference
     // count, so this will delete the MessageLoop resource. We do this before
     // we clear plugin_globals_, because the Resource destructor tries to access
@@ skipping 109 matching lines @@
 MessageLoopResource* PluginGlobals::loop_for_main_thread() {
   return loop_for_main_thread_.get();
 }
 
 bool PluginGlobals::IsPluginGlobals() const {
   return true;
 }
 
 }  // namespace proxy
 }  // namespace ppapi