Pepper UDP socket: buffer received packets in the plugin process to improve performance.

ppapi/host/resource_message_filter.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_HOST_RESOURCE_MESSAGE_FILTER_H_
 #define PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_
 
 #include "base/memory/ref_counted.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/host/host_message_context.h"
@@ skipping 88 matching lines @@
   virtual bool HandleMessage(const IPC::Message& msg,
                              HostMessageContext* context) OVERRIDE;
 
   // This can be called from any thread.
   virtual void SendReply(const ReplyMessageContext& context,
       const IPC::Message& msg) OVERRIDE;
 
  protected:
   virtual ~ResourceMessageFilter();
 
+  // Please see the comments of |resource_host_| for on which thread it can be
+  // used and when it is NULL.
+  ResourceHost* resource_host() const { return resource_host_; }
+
   // If you want the message to be handled on another thread, return a non-null
   // task runner which will target tasks accordingly.
   virtual scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
       const IPC::Message& message);
 
  private:
   friend class base::DeleteHelper<ResourceMessageFilter>;
   friend class base::RefCountedThreadSafe<
       ResourceMessageFilter, internal::ResourceMessageFilterDeleteTraits>;
   friend struct internal::ResourceMessageFilterDeleteTraits;
@@ skipping 17 matching lines @@
   // is destroyed, |OnFilterDestroyed| is called and this will be set to NULL.
   ResourceHost* resource_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceMessageFilter);
 };
 
 }  // namespace host
 }  // namespace ppapi
 
 #endif  // PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_