Use webrtc::VideoFrame timestamp in RTCVideoEncoder

media/gpu/video_encode_accelerator_unittest.cc

Index: media/gpu/video_encode_accelerator_unittest.cc
diff --git a/media/gpu/video_encode_accelerator_unittest.cc b/media/gpu/video_encode_accelerator_unittest.cc
index 7ba3fe8d83e6ef8be99a1efb7b94f6d108a7a73a..79fb4bc189434238257bcc72e0424c956677b12e 100644
--- a/media/gpu/video_encode_accelerator_unittest.cc
+++ b/media/gpu/video_encode_accelerator_unittest.cc
@@ -564,6 +564,9 @@ class H264Validator : public StreamValidator {
 void H264Validator::ProcessStreamBuffer(const uint8_t* stream, size_t size) {
   h264_parser_.SetStream(stream, static_cast<off_t>(size));
 
+  // Run |frame_cb_| for only first nalu.
+  bool seen_nonidr = false;
+
   while (1) {
     H264NALU nalu;
     H264Parser::Result result;
@@ -1836,6 +1839,15 @@ INSTANTIATE_TEST_CASE_P(MultipleEncoders,
                                                           false,
                                                           false,
                                                           false)));
+
+#if defined(OS_MACOSX)
+INSTANTIATE_TEST_CASE_P(
+    VerifyTimestamp,
+    VideoEncodeAcceleratorTest,
+    ::testing::Values(
+        std::make_tuple(1, false, 0, false, false, false, false, false, true)));
+#endif  // defined(OS_MACOSX)
+
 #if defined(OS_WIN)
 INSTANTIATE_TEST_CASE_P(
     ForceBitrate,