Ensure that PP_Instance values are unique within a plugin process in addition...

chrome/ppapi_plugin/ppapi_thread.h

 // Copyright (c) 2010 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 CHROME_PPAPI_PLUGIN_PPAPI_THREAD_H_
 #define CHROME_PPAPI_PLUGIN_PPAPI_THREAD_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/process.h"
 #include "base/scoped_native_library.h"
 #include "base/scoped_ptr.h"
 #include "build/build_config.h"
 #include "content/common/child_thread.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/proxy/dispatcher.h"
 
 class FilePath;
 
 namespace IPC {
 struct ChannelHandle;
 }
 
 namespace pp {
 namespace proxy {
 class PluginDispatcher;
 }
 }
 
-class PpapiThread : public ChildThread {
+class PpapiThread : public ChildThread,
+                    public pp::proxy::Dispatcher::Delegate {
  public:
   PpapiThread();
   ~PpapiThread();
 
  private:
   // ChildThread overrides.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
+  // Dispatcher::Delegate implementation.
+  virtual MessageLoop* GetIPCMessageLoop();
+  virtual base::WaitableEvent* GetShutdownEvent();
+  virtual std::set<PP_Instance>* GetGloballySeenInstanceIDSet();
+
   // Message handlers.
   void OnMsgLoadPlugin(const FilePath& path);
   void OnMsgCreateChannel(base::ProcessHandle host_process_handle,
                           int renderer_id);
 
   // Sets up the channel to the given renderer. On success, returns true and
   // fills the given ChannelHandle with the information from the new channel.
   bool SetupRendererChannel(base::ProcessHandle host_process_handle,
                             int renderer_id,
                             IPC::ChannelHandle* handle);
 
   base::ScopedNativeLibrary library_;
 
   pp::proxy::Dispatcher::GetInterfaceFunc get_plugin_interface_;
 
   // Local concept of the module ID. Some functions take this. It's necessary
   // for the in-process PPAPI to handle this properly, but for proxied it's
   // unnecessary. The proxy talking to multiple renderers means that each
   // renderer has a different idea of what the module ID is for this plugin.
   // To force people to "do the right thing" we generate a random module ID
   // and pass it around as necessary.
   PP_Module local_pp_module_;
 
+  // See Dispatcher::Delegate::GetGloballySeenInstanceIDSet.
+  std::set<PP_Instance> globally_seen_instance_ids_;
+
   DISALLOW_COPY_AND_ASSIGN(PpapiThread);
 };
 
 #endif  // CHROME_PPAPI_PLUGIN_PPAPI_THREAD_H_