RTC Video Encoder: Use capturer timestamp

media/gpu/ipc/common/media_messages.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/common/gpu_param_traits_macros.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 178 matching lines @@
                     uint32_t /* output_buffer_size */)
 
 // Notify the renderer that the encoder has finished using an input buffer.
 // There is no congruent entry point in the media::VideoEncodeAccelerator
 // interface, in VEA this same done condition is indicated by dropping the
 // reference to the media::VideoFrame passed to VEA::Encode().
 IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyInputDone,
                     int32_t /* frame_id */)
 
 // Notify the renderer that an output buffer has been filled with encoded data.
-IPC_MESSAGE_ROUTED3(AcceleratedVideoEncoderHostMsg_BitstreamBufferReady,
+IPC_MESSAGE_ROUTED4(AcceleratedVideoEncoderHostMsg_BitstreamBufferReady,
                     int32_t /* bitstream_buffer_id */,
                     uint32_t /* payload_size */,
-                    bool /* key_frame */)
+                    bool /* key_frame */,
+                    base::TimeDelta /* timestamp */)
 
 // Report error condition.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyError,
                     media::VideoEncodeAccelerator::Error /* error */)
 
 // Send destroy request to the encoder.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoEncoderMsg_Destroy)
 
 //------------------------------------------------------------------------------
 // Accelerated JPEG Decoder Messages
@@ skipping 18 matching lines @@
 IPC_MESSAGE_ROUTED0(AcceleratedJpegDecoderMsg_Destroy)
 
 //------------------------------------------------------------------------------
 // Accelerated JPEG Decoder Host Messages
 // These messages are sent from the GPU process to Browser process.
 //
 // Report decode status.
 IPC_MESSAGE_ROUTED2(AcceleratedJpegDecoderHostMsg_DecodeAck,
                     int32_t, /* bitstream_buffer_id */
                     media::JpegDecodeAccelerator::Error /* error */)