Cast: Add JS API to get raw events logs from cast extension.

chrome/renderer/resources/extensions/cast_streaming_rtp_stream_custom_bindings.js

 // Copyright 2013 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.
 
 // Custom binding for the Cast Streaming RtpStream API.
 
 var binding = require('binding').Binding.create('cast.streaming.rtpStream');
 var natives = requireNative('cast_streaming_natives');
 
 binding.registerCustomHook(function(bindingsAPI, extensionId) {
   var apiFunctions = bindingsAPI.apiFunctions;
 
   apiFunctions.setHandleRequest('destroy',
       function(transportId) {
         natives.DestroyCastRtpStream(transportId);
   });
   apiFunctions.setHandleRequest('getSupportedParams',
       function(transportId) {
         return natives.GetSupportedParamsCastRtpStream(transportId);
   });
   apiFunctions.setHandleRequest('start',
       function(transportId, params) {
         natives.StartCastRtpStream(transportId, params);
   });
   apiFunctions.setHandleRequest('stop',
       function(transportId) {
         natives.StopCastRtpStream(transportId);
   });
+  apiFunctions.setHandleRequest('toggleLogging',
+      function(transportId, enable) {
+        natives.ToggleLogging(transportId, enable);
+  });
+  apiFunctions.setHandleRequest('getRawEvents',
+      function(transportId, callback) {
+        natives.GetRawEvents(transportId, callback);
+  });
+  apiFunctions.setHandleRequest('getStats',
+      function(transportId, callback) {
+        natives.GetStats(transportId, callback);
+  });
 });
 
 exports.binding = binding.generate();