Adds StartRtpDump and StopRtpDump methods to webrtcLoggingPrivate API.

chrome/browser/media/webrtc_logging_handler_host.h

Index: chrome/browser/media/webrtc_logging_handler_host.h
diff --git a/chrome/browser/media/webrtc_logging_handler_host.h b/chrome/browser/media/webrtc_logging_handler_host.h
index d4605ba6d402f1c3afd5f89de95b76eabdcc468d..e9f36d276ef3753b1faa66f17dcd5da0b133006a 100644
--- a/chrome/browser/media/webrtc_logging_handler_host.h
+++ b/chrome/browser/media/webrtc_logging_handler_host.h
@@ -73,6 +73,18 @@ class WebRtcLoggingHandlerHost : public content::BrowserMessageFilter {
     upload_log_on_render_close_ = should_upload;
   }
 
+  // Starts dumping the RTP headers for the specified direction. Must be called
+  // on the IO thread.

[vrk (LEFT CHROMIUM), 2014/05/02 18:13:48]

nit: expand comment to explain the parameters.

[jiayl, 2014/05/02 21:22:43]

Done.

+  void StartRtpDump(bool incoming,
+                    bool outgoing,
+                    const GenericDoneCallback& callback);
+
+  // Stops dumping the RTP headers for the specified direction. Must be called
+  // on the IO thread.

[vrk (LEFT CHROMIUM), 2014/05/02 18:13:48]

nit: expand comment to explain the parameters.

[jiayl, 2014/05/02 21:22:43]

Done.

+  void StopRtpDump(bool incoming,
+                   bool outgoing,
+                   const GenericDoneCallback& callback);
+
  private:
   // States used for protecting from function calls made at non-allowed points
   // in time. For example, StartLogging() is only allowed in CLOSED state.