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

chrome/test/data/extensions/api_test/cast_streaming/common.js

Index: chrome/test/data/extensions/api_test/cast_streaming/common.js
diff --git a/chrome/test/data/extensions/api_test/cast_streaming/common.js b/chrome/test/data/extensions/api_test/cast_streaming/common.js
new file mode 100644
index 0000000000000000000000000000000000000000..36b6aec8287b2bb4ca13248486bc3366400b0bea
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/cast_streaming/common.js
@@ -0,0 +1,47 @@
+// Copyright 2014 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.
+
+function TestStateMachine(stream, audioId, videoId, udpId) {
+  this.stream = stream;
+  this.audioId = audioId;
+  this.videoId = videoId;
+  this.udpId = udpId;
+  this.audioStarted = false;
+  this.videoStarted = false;
+  this.audioStopped = false;
+  this.videoStopped = false;
+  this.gotAudioRawEvents = false;
+  this.gotVideoRawEvents = false;
+}
+
+TestStateMachine.prototype.onStarted = function(id) {
+  if (id == this.audioId)
+    this.audioStarted = true;
+  if (id == this.videoId)
+    this.videoStarted = true;
+  if (this.audioStarted && this.videoStarted)
+    this.onAllStarted();
+}
+
+TestStateMachine.prototype.onStopped = function(id) {
+  if (id == this.audioId)
+    this.audioStopped = true;
+  if (id == this.videoId)
+    this.videoStopped = true;
+  if (this.audioStopped && this.videoStopped)
+    this.onAllStopped();
+}
+
+TestStateMachine.prototype.onGotRawEvents = function(id, rawEvents) {
+  chrome.test.assertTrue(rawEvents.length > 0);
+  if (id == this.audioId) {
+    this.gotAudioRawEvents = true;
+  }
+  if (id == this.videoId) {
+    this.gotVideoRawEvents = true;
+  }
+  if (this.gotAudioRawEvents && this.gotVideoRawEvents)
+    this.onGotAllRawEvents();
+}
+