Implements RTP header dumping.

content/public/browser/render_process_host.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 CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/id_map.h"
 #include "base/process/kill.h"
@@ skipping 187 matching lines @@
 
 #if defined(ENABLE_WEBRTC)
   virtual void EnableAecDump(const base::FilePath& file) = 0;
   virtual void DisableAecDump() = 0;
 
   // When set, |callback| receives log messages regarding, for example, media
   // devices (webcams, mics, etc) that were initially requested in the render
   // process associated with this RenderProcessHost.
   virtual void SetWebRtcLogMessageCallback(
       base::Callback<void(const std::string&)> callback) = 0;
+
+  typedef base::Callback<void(const uint8* packet_header,
+                              size_t header_length,
+                              size_t packet_length,
+                              bool incoming)> WebRtcRtpPacketCallback;
+
+  typedef base::Callback<void(bool incoming, bool outgoing)>
+      WebRtcStopRtpDumpCallback;
+
+  // Starts passing RTP packets to |packet_callback| and returns the callback
+  // used to stop dumping. StartRtpDump must be called on the UI thread.
+  // The returned WebRtcStopRtpDumpCallback and |packet_callback| must be called
+  // on the UI thread too.

[jam, 2014/05/21 23:50:09]

nit: remove all mentions of UI thread in the comment, since by default any
object in content/public runs on UI thread unless otherwise stted

+  virtual WebRtcStopRtpDumpCallback StartRtpDump(
+      bool incoming,
+      bool outgoing,
+      const WebRtcRtpPacketCallback& packet_callback) = 0;
 #endif
 
   // Tells the ResourceDispatcherHost to resume a deferred navigation without
   // transferring it to a new renderer process.
   virtual void ResumeDeferredNavigation(const GlobalRequestID& request_id) = 0;
 
   // Notifies the renderer that the timezone configuration of the system might
   // have changed.
   virtual void NotifyTimezoneChange() = 0;
 
@@ skipping 48 matching lines @@
   static void SetMaxRendererProcessCount(size_t count);
 
   // Returns the current max number of renderer processes used by the content
   // module.
   static size_t GetMaxRendererProcessCount();
 };
 
 }  // namespace content.
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_