Delete VideoFrame default constructor, and IsZeroSize method.

webrtc/common_video/libyuv/webrtc_libyuv.cc

 /*
  *  Copyright (c) 2012 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 110 matching lines @@
   }
   if (PrintPlane(frame.DataV(),
                  chroma_width, chroma_height,
                  frame.StrideV(), file) < 0) {
     return -1;
   }
   return 0;
 }
 
 int PrintVideoFrame(const VideoFrame& frame, FILE* file) {
-  if (frame.IsZeroSize())
-    return -1;
   return PrintVideoFrame(*frame.video_frame_buffer(), file);
 }
 
 int ExtractBuffer(const rtc::scoped_refptr<VideoFrameBuffer>& input_frame,
                   size_t size,
                   uint8_t* buffer) {
   RTC_DCHECK(buffer);
   if (!input_frame)
     return -1;
   int width = input_frame->width();
@@ skipping 299 matching lines @@
                     src_v, src_uv_width,
                     src_width, src_height,
                     dst_y, dst_stride_y,
                     dst_u, dst_stride_u,
                     dst_v, dst_stride_v,
                     dst_width, dst_height,
                     libyuv::kFilterBox);
 }
 
 }  // namespace webrtc