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

ppapi/proxy/plugin_globals.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_GLOBALS_H_
 #define PPAPI_PROXY_PLUGIN_GLOBALS_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 16 matching lines @@
 struct PP_BrowserFont_Trusted_Description;
 
 namespace ppapi {
 
 struct Preferences;
 
 namespace proxy {
 
 class MessageLoopResource;
 class PluginProxyDelegate;
+class ResourceReplyThreadRegistrar;
 
 class PPAPI_PROXY_EXPORT PluginGlobals : public PpapiGlobals {
  public:
   PluginGlobals();
   explicit PluginGlobals(PpapiGlobals::PerThreadForTest);
   virtual ~PluginGlobals();
 
   // Getter for the global singleton. Generally, you should use
   // PpapiGlobals::Get() when possible. Use this only when you need some
   // plugin-specific functionality.
@@ skipping 74 matching lines @@
   // long as the plugin.
   MessageLoopResource* loop_for_main_thread();
 
   // The embedder should call this function when the name of the plugin module
   // is known. This will be used for error logging.
   void set_plugin_name(const std::string& name) { plugin_name_ = name; }
 
   // The embedder should call this function when the command line is known.
   void set_command_line(const std::string& c) { command_line_ = c; }
 
+  ResourceReplyThreadRegistrar* resource_reply_thread_registrar() {
+    return resource_reply_thread_registrar_.get();
+  }
+
  private:
   class BrowserSender;
 
   // PpapiGlobals overrides.
   virtual bool IsPluginGlobals() const OVERRIDE;
 
   static PluginGlobals* plugin_globals_;
 
   PluginProxyDelegate* plugin_proxy_delegate_;
   PluginResourceTracker plugin_resource_tracker_;
@@ skipping 12 matching lines @@
   // Command line for the plugin. This will be empty until set_command_line is
   // called.
   std::string command_line_;
 
   scoped_ptr<BrowserSender> browser_sender_;
 
   // Thread for performing potentially blocking file operations. It's created
   // lazily, since it might not be needed.
   scoped_ptr<base::Thread> file_thread_;
 
+  scoped_refptr<ResourceReplyThreadRegistrar> resource_reply_thread_registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(PluginGlobals);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif   // PPAPI_PROXY_PLUGIN_GLOBALS_H_