Delete IsZeroSize method.

webrtc/video_frame.h

 /*
  *  Copyright (c) 2014 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 126 matching lines @@
   }
 
   // Set render time in milliseconds.
   void set_render_time_ms(int64_t render_time_ms) {
     render_time_ms_ = render_time_ms;
   }
 
   // Get render time in milliseconds.
   int64_t render_time_ms() const { return render_time_ms_; }
 
-  // Return true if and only if video_frame_buffer() is null. Which is possible
-  // only if the object was default-constructed.
-  // TODO(nisse): Deprecated. Should be deleted in the cricket::VideoFrame and
-  // webrtc::VideoFrame merge. The intention is that video_frame_buffer() never
-  // should return nullptr. To handle potentially uninitialized or non-existent
-  // frames, consider using rtc::Optional. Otherwise, IsZeroSize() can be
-  // replaced by video_frame_buffer() == nullptr.
-  bool IsZeroSize() const;
-
   // Return the underlying buffer. Never nullptr for a properly
   // initialized VideoFrame.
   // Creating a new reference breaks the HasOneRef and IsMutable
   // logic. So return a const ref to our reference.
   const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& video_frame_buffer()
       const;
 
   // Return true if the frame is stored in a texture.
   bool is_texture() {
     return video_frame_buffer() &&
@@ skipping 52 matching lines @@
   int qp_ = -1;  // Quantizer value.
 
   // When an application indicates non-zero values here, it is taken as an
   // indication that all future frames will be constrained with those limits
   // until the application indicates a change again.
   PlayoutDelay playout_delay_ = {-1, -1};
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_VIDEO_FRAME_H_