RTC Video Encoder: Use capturer timestamp

media/video/video_encode_accelerator.h

Index: media/video/video_encode_accelerator.h
diff --git a/media/video/video_encode_accelerator.h b/media/video/video_encode_accelerator.h
index b147d9140955012b27f9b16c064e1dc61abe84f2..bd4fc0d14ed008198a16a9bd5616daf23af7cc3f 100644
--- a/media/video/video_encode_accelerator.h
+++ b/media/video/video_encode_accelerator.h
@@ -79,9 +79,11 @@ class MEDIA_EXPORT VideoEncodeAccelerator {
     //  |bitstream_buffer_id| is the id of the buffer that is ready.
     //  |payload_size| is the byte size of the used portion of the buffer.
     //  |key_frame| is true if this delivered frame is a keyframe.
+    //  |timestamp| is the captured NTP timestamp in milliseconds.

[Pawel Osciak, 2016/05/26 07:39:23]

TimeDelta is not necessarily in milliseconds, nor it has to be NTP. We should
just say that this is the same timestamp as the timestamp in VideoFrame passed
to Encode() please.

[shenghao, 2016/05/26 10:38:20]

Done.

     virtual void BitstreamBufferReady(int32_t bitstream_buffer_id,
                                       size_t payload_size,
-                                      bool key_frame) = 0;
+                                      bool key_frame,
+                                      base::TimeDelta timestamp) = 0;
 
     // Error notification callback. Note that errors in Initialize() will not be
     // reported here, but will instead be indicated by a false return value