Cast: cast.streaming API to support null audio (or video) track

chrome/browser/media/media_capture_devices_dispatcher.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
 
 #include "apps/app_window.h"
 #include "apps/app_window_registry.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 100 matching lines @@
 }
 
 bool IsBuiltInExtension(const GURL& origin) {
   return
       // Feedback Extension.
       origin.spec() == "chrome-extension://gfdkimpbcpahaombhbimeihdjnejgicl/";
 }
 
 // Returns true of the security origin is associated with casting.
 bool IsOriginForCasting(const GURL& origin) {
-#if defined(OFFICIAL_BUILD)
   // Whitelisted tab casting extensions.
   return
       // Dev
       origin.spec() == "chrome-extension://enhhojjnijigcajfphajepfemndkmdlo/" ||
       // Canary
       origin.spec() == "chrome-extension://hfaagokkkhdbgiakmmlclaapfelnkoah/" ||
       // Beta (internal)
       origin.spec() == "chrome-extension://fmfcbgogabcbclcofgocippekhfcmgfj/" ||
       // Google Cast Beta
       origin.spec() == "chrome-extension://dliochdbjfkdbacpmhlcpmleaejidimm/" ||
       // Google Cast Stable
       origin.spec() == "chrome-extension://boadgeojelhgndaghljhdicfkmllpafd/";
-#else
-  return false;
-#endif
 }
 
 // Helper to get title of the calling application shown in the screen capture
 // notification.
 base::string16 GetApplicationTitle(content::WebContents* web_contents,
                                    const extensions::Extension* extension) {
   // Use extension name as title for extensions and host/origin for drive-by
   // web.
   std::string title;
   if (extension) {
@@ skipping 836 matching lines @@
 
 void MediaCaptureDevicesDispatcher::SetTestAudioCaptureDevices(
     const MediaStreamDevices& devices) {
   test_audio_devices_ = devices;
 }
 
 void MediaCaptureDevicesDispatcher::SetTestVideoCaptureDevices(
     const MediaStreamDevices& devices) {
   test_video_devices_ = devices;
 }