1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_MESSAGE_FILTER_H_ 6 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_MESSAGE_FILTER_H_ 7 8 #include "content/public/browser/browser_message_filter.h" 9 10 namespace content { 11 class RenderWidgetHelper; 12 13 // RenderFrameMessageFilter intercepts FrameHost messages on the IO thread 14 // that require low-latency processing. The canonical example of this is 15 // child-frame creation which is a sync IPC that provides the renderer 16 // with the routing id for a newly created RenderFrame. 17 // 18 // This object is created on the UI thread and used on the IO thread. 19 class RenderFrameMessageFilter : public BrowserMessageFilter { 20 public: 21 RenderFrameMessageFilter(int render_process_id, 22 RenderWidgetHelper* render_widget_helper); 23 24 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 25 26 private: 27 virtual ~RenderFrameMessageFilter(); 28 29 void OnCreateChildFrame(int parent_routing_id, 30 const std::string& frame_name, 31 int* new_render_frame_id); 32 33 const int render_process_id_; 34 35 // Needed for issuing routing ids and surface ids. 36 scoped_refptr<RenderWidgetHelper> render_widget_helper_; 37 }; 38 39 } // namespace content 40 41 #endif // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_MESSAGE_FILTER_H_ 42
