render_frame_message_filter.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
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
10namespace content {
11class 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.
19class 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,
25                                 bool* message_was_ok) OVERRIDE;
26
27 private:
28  virtual ~RenderFrameMessageFilter();
29
30  void OnCreateChildFrame(int parent_routing_id,
31                          const std::string& frame_name,
32                          int* new_render_frame_id);
33
34  const int render_process_id_;
35
36  // Needed for issuing routing ids and surface ids.
37  scoped_refptr<RenderWidgetHelper> render_widget_helper_;
38};
39
40}  // namespace content
41
42#endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_MESSAGE_FILTER_H_
43