Decouple capture timestamp and reference time

media/capture/video/android/video_capture_device_android.cc

Index: media/capture/video/android/video_capture_device_android.cc
diff --git a/media/capture/video/android/video_capture_device_android.cc b/media/capture/video/android/video_capture_device_android.cc
index da2434275ae58dcdb02521c3581b9a7f7a8d7b22..28bf0532b47bc8423853edcfae565bd1701defb8 100644
--- a/media/capture/video/android/video_capture_device_android.cc
+++ b/media/capture/video/android/video_capture_device_android.cc
@@ -184,6 +184,7 @@ void VideoCaptureDeviceAndroid::OnFrameAvailable(
   if (!got_first_frame_) {
     // Set aside one frame allowance for fluctuation.
     expected_next_frame_time_ = current_time - frame_interval_;
+    first_ref_time_ = current_time;

[miu, 2016/05/18 22:35:40]

There's probably a way to pass the video capture timestamp from the Java code to
this native code. If you don't want to fix this in this change, then please at
least add a TODO comment like "This is a place-holder for the video capture
frame timestamp. The actual timestamp (provided by the platform) should be
plumbed-through to here."

[qiangchen, 2016/05/20 17:55:14]

Done.

     got_first_frame_ = true;
   }
 
@@ -192,8 +193,8 @@ void VideoCaptureDeviceAndroid::OnFrameAvailable(
     expected_next_frame_time_ += frame_interval_;
 
     client_->OnIncomingCapturedData(reinterpret_cast<uint8_t*>(buffer), length,
-                                    capture_format_, rotation,
-                                    base::TimeTicks::Now());
+                                    capture_format_, rotation, current_time,
+                                    current_time - first_ref_time_);
   }
 
   env->ReleaseByteArrayElements(data, buffer, JNI_ABORT);