Implements RTP header dumping.

content/public/browser/render_process_host.h

Index: content/public/browser/render_process_host.h
diff --git a/content/public/browser/render_process_host.h b/content/public/browser/render_process_host.h
index 66a96eca5c6aca95d61c3ce68656669350f7c3fb..e7267e9144fc448c4866b370c58cddcd942c03ce 100644
--- a/content/public/browser/render_process_host.h
+++ b/content/public/browser/render_process_host.h
@@ -205,6 +205,23 @@ class CONTENT_EXPORT RenderProcessHost : public IPC::Sender,
   // 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 must be called on the IO thread.
+  // |packet_callback| can be called on any thread.
+  virtual WebRtcStopRtpDumpCallback StartRtpDump(
+      bool incoming,
+      bool outgoing,
+      const WebRtcRtpPacketCallback& packet_callback) = 0;
 #endif
 
   // Tells the ResourceDispatcherHost to resume a deferred navigation without