Cast: Add GetStats() extensions API.

chrome/test/data/extensions/api_test/cast_streaming/basics.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.
 
 var rtpStream = chrome.cast.streaming.rtpStream;
 var tabCapture = chrome.tabCapture;
 var udpTransport = chrome.cast.streaming.udpTransport;
 var createSession = chrome.cast.streaming.session.create;
 var pass = chrome.test.callbackPass;
 
@@ skipping 27 matching lines @@
           rtpStream.toggleLogging(videoId, true);
           console.log("Stopping.");
           rtpStream.stop(audioId);
           rtpStream.stop(videoId);
         }.bind(null, audioId, videoId));
         rtpStream.onStopped.addListener(
             stateMachine.onStopped.bind(stateMachine));
         stateMachine.onAllStopped =
             pass(function(audioId, videoId) {
           rtpStream.getRawEvents(audioId,
-              stateMachine.onGotRawEvents.bind(stateMachine, audioId));
+              stateMachine.onGotLogs.bind(stateMachine, audioId, false));

[Alpha Left Google, 2014/03/03 07:11:39]

This test is already complicated. I'd refer getStats() to go into a separate
test.

[imcheng, 2014/03/04 02:06:24]

Done.

           rtpStream.getRawEvents(videoId,
-              stateMachine.onGotRawEvents.bind(stateMachine, videoId));
+              stateMachine.onGotLogs.bind(stateMachine, videoId, false));
+          rtpStream.getStats(audioId,
+              stateMachine.onGotLogs.bind(stateMachine, audioId, true));
+          rtpStream.getStats(videoId,
+              stateMachine.onGotLogs.bind(stateMachine, videoId, true));
         }.bind(null, audioId, videoId));
-        stateMachine.onGotAllRawEvents =
+        stateMachine.onGotAllLogs =
             pass(function(stream, audioId, videoId, udpId) {
           console.log("Disabling logging.");
           rtpStream.toggleLogging(audioId, false);
           rtpStream.toggleLogging(videoId, false);
           console.log("Destroying.");
           rtpStream.destroy(audioId);
           rtpStream.destroy(videoId);
           udpTransport.destroy(udpId);
           chrome.test.assertEq(audioParams.payload.codecName, "OPUS");
           chrome.test.assertEq(videoParams.payload.codecName, "VP8");
           chrome.test.succeed();
         }.bind(null, stream, audioId, videoId, udpId));
         rtpStream.start(audioId, audioParams);
         rtpStream.start(videoId, videoParams);
       }.bind(null, stream)));
     }));
   },
 ]);