[cast] Handle frame size changes directly in the VideoToolbox encoder (v2).

media/cast/sender/video_encoder.cc

 // 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.
 
 #include "media/cast/sender/video_encoder.h"
 
 #include "media/cast/sender/external_video_encoder.h"
 #include "media/cast/sender/video_encoder_impl.h"
 
 #if defined(OS_MACOSX)
 #include "media/cast/sender/h264_vt_encoder.h"
 #endif
 
 namespace media {
 namespace cast {
 
 // static
 scoped_ptr<VideoEncoder> VideoEncoder::Create(
       const scoped_refptr<CastEnvironment>& cast_environment,
       const VideoSenderConfig& video_config,
       const StatusChangeCallback& status_change_cb,
       const CreateVideoEncodeAcceleratorCallback& create_vea_cb,
       const CreateVideoEncodeMemoryCallback& create_video_encode_memory_cb) {
   // On MacOS or IOS, attempt to use the system VideoToolbox library to
   // perform optimized H.264 encoding.
 #if defined(OS_MACOSX) || defined(OS_IOS)
   if (!video_config.use_external_encoder &&
       H264VideoToolboxEncoder::IsSupported(video_config)) {
-    return scoped_ptr<VideoEncoder>(
-        new SizeAdaptableH264VideoToolboxVideoEncoder(
-            cast_environment,
-            video_config,
-            status_change_cb));
+    return scoped_ptr<VideoEncoder>(new H264VideoToolboxEncoder(
+        cast_environment, video_config, status_change_cb));
   }
 #endif  // defined(OS_MACOSX)
 
 #if !defined(OS_IOS)
   // If the system provides a hardware-accelerated encoder, use it.
   if (ExternalVideoEncoder::IsSupported(video_config)) {
     return scoped_ptr<VideoEncoder>(new SizeAdaptableExternalVideoEncoder(
         cast_environment,
         video_config,
         status_change_cb,
@@ skipping 16 matching lines @@
 
 scoped_ptr<VideoFrameFactory> VideoEncoder::CreateVideoFrameFactory() {
   return nullptr;
 }
 
 void VideoEncoder::EmitFrames() {
 }
 
 }  // namespace cast
 }  // namespace media