[Cast] Software encoder support for varying video frame sizes.

media/cast/sender/external_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/external_video_encoder.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/shared_memory.h"
@@ skipping 329 matching lines @@
                  weak_factory_.GetWeakPtr(),
                  frame_size,
                  codec_profile,
                  video_config.max_frame_rate,
                  initialization_cb));
 }
 
 ExternalVideoEncoder::~ExternalVideoEncoder() {
 }
 
+bool ExternalVideoEncoder::CanEncodeVariedFrameSizes() const {
+  return false;
+}
+
 bool ExternalVideoEncoder::EncodeVideoFrame(
     const scoped_refptr<media::VideoFrame>& video_frame,
     const base::TimeTicks& reference_time,
     const FrameEncodedCallback& frame_encoded_callback) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   DCHECK(!video_frame->visible_rect().IsEmpty());
   DCHECK(!frame_encoded_callback.is_null());
 
   if (!client_)
     return false;  // Not ready.
@@ skipping 61 matching lines @@
                                    base::Bind(&VEAClientImpl::Initialize,
                                               client_,
                                               frame_size,
                                               codec_profile,
                                               bit_rate_,
                                               initialization_cb));
 }
 
 }  //  namespace cast
 }  //  namespace media