Revert of Add a flags field to video timing extension.

webrtc/modules/video_coding/generic_encoder_unittest.cc

 /*
  *  Copyright (c) 2017 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 13 matching lines @@
                         const int& i) {
   return min_frame_size + (s + 1) * i % (max_frame_size - min_frame_size);
 }
 
 class FakeEncodedImageCallback : public EncodedImageCallback {
  public:
   FakeEncodedImageCallback() : last_frame_was_timing_(false) {}
   Result OnEncodedImage(const EncodedImage& encoded_image,
                         const CodecSpecificInfo* codec_specific_info,
                         const RTPFragmentationHeader* fragmentation) override {
-    last_frame_was_timing_ =
-        encoded_image.timing_.flags != TimingFrameFlags::kInvalid;
+    last_frame_was_timing_ = encoded_image.timing_.is_timing_frame;
     return Result(Result::OK);
   };
 
   bool WasTimingFrame() { return last_frame_was_timing_; }
 
  private:
   bool last_frame_was_timing_;
 };
 
 enum class FrameType {
@@ skipping 114 matching lines @@
           kAverageSize[s] * kDefaultOutlierFrameSizePercent / 100) {
         // Too big frame. May be dropped or timing, but not normal.
         EXPECT_NE(frames[s][i], FrameType::kNormal);
       }
     }
   }
 }
 
 }  // namespace test
 }  // namespace webrtc