Delete IsZeroSize method.

webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc

 /*
  *  Copyright (c) 2015 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.
  *
  */
@@ skipping 259 matching lines @@
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 int32_t H264EncoderImpl::Encode(const VideoFrame& input_frame,
                                 const CodecSpecificInfo* codec_specific_info,
                                 const std::vector<FrameType>* frame_types) {
   if (!IsInitialized()) {
     ReportError();
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
   }
-  if (input_frame.IsZeroSize()) {

[stefan-webrtc, 2016/09/05 14:45:25]

Should we DCHECK that we have a video_frame_buffer, or is that not needed?

-    ReportError();
-    return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
-  }
   if (!encoded_image_callback_) {
     LOG(LS_WARNING) << "InitEncode() has been called, but a callback function "
                     << "has not been set with RegisterEncodeCompleteCallback()";
     ReportError();
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
   }
 
   quality_scaler_.OnEncodeFrame(input_frame.width(), input_frame.height());
   rtc::scoped_refptr<const VideoFrameBuffer> frame_buffer =
       quality_scaler_.GetScaledBuffer(input_frame.video_frame_buffer());
@@ skipping 176 matching lines @@
 
 int32_t H264EncoderImpl::SetPeriodicKeyFrames(bool enable) {
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 void H264EncoderImpl::OnDroppedFrame() {
   quality_scaler_.ReportDroppedFrame();
 }
 
 }  // namespace webrtc