Add a hang monitor for Pepper plugins

ppapi/proxy/dispatcher.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_DISPATCHER_H_
 #define PPAPI_PROXY_DISPATCHER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 50 matching lines @@
   // created so far.
   InterfaceProxy* GetInterfaceProxy(ApiID id);
 
   // Returns the pointer to the IO thread for processing IPC messages.
   // TODO(brettw) remove this. It's a hack to support the Flash
   // ModuleLocalThreadAdapter. When the thread stuff is sorted out, this
   // implementation detail should be hidden.
   base::MessageLoopProxy* GetIPCMessageLoop();
 
   // Adds the given filter to the IO thread. Takes ownership of the pointer.
-  // TODO(brettw) remove this. It's a hack to support the Flash
-  // ModuleLocalThreadAdapter. When the thread stuff is sorted out, this
-  // implementation detail should be hidden.
   void AddIOThreadMessageFilter(IPC::ChannelProxy::MessageFilter* filter);
 
   // TODO(brettw): What is this comment referring to?
   // Called if the remote side is declaring to us which interfaces it supports
   // so we don't have to query for each one. We'll pre-create proxies for
   // each of the given interfaces.
 
   // IPC::Channel::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
@@ skipping 28 matching lines @@
 
   scoped_refptr<VarSerializationRules> serialization_rules_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_DISPATCHER_H_