Revert of Remove all reference to carbon api

webrtc/media/devices/videorendererfactory.h

 /*
  *  Copyright (c) 2010 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 //
 // A factory to create a GUI video renderer.
 
 #ifndef WEBRTC_MEDIA_DEVICES_VIDEORENDERERFACTORY_H_
 #define WEBRTC_MEDIA_DEVICES_VIDEORENDERERFACTORY_H_
 
 #include "webrtc/media/base/videosinkinterface.h"
 #if defined(WEBRTC_LINUX) && defined(HAVE_GTK)
 #include "webrtc/media/devices/gtkvideorenderer.h"
+#elif defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) && !defined(CARBON_DEPRECATED)
+#include "webrtc/media/devices/carbonvideorenderer.h"
 #elif defined(WIN32)
 #include "webrtc/media/devices/gdivideorenderer.h"
 #endif
 
 namespace cricket {
 
 class VideoRendererFactory {
  public:
   static rtc::VideoSinkInterface<cricket::VideoFrame>* CreateGuiVideoRenderer(
       int x,
       int y) {
   #if defined(WEBRTC_LINUX) && defined(HAVE_GTK)
     return new GtkVideoRenderer(x, y);
+  #elif defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) && \
+      !defined(CARBON_DEPRECATED)
+    CarbonVideoRenderer* renderer = new CarbonVideoRenderer(x, y);
+    // Needs to be initialized on the main thread.
+    if (renderer->Initialize()) {
+      return renderer;
+    } else {
+      delete renderer;
+      return NULL;
+    }
   #elif defined(WIN32)
     return new GdiVideoRenderer(x, y);
   #else
     return NULL;
   #endif
   }
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_DEVICES_VIDEORENDERERFACTORY_H_