video_PlaybackPerf: fix paths of video files.

The paths of video files in control.h264.arc and
control.vp9.arc should add traffic/ prefix.

BUG=chromium:624271
TEST=Run the test on elm-cheets.

Change-Id: I95503d6a150f7363cbea69af44cc4319472c1543
Reviewed-on: https://chromium-review.googlesource.com/356950
Commit-Ready: Wu-cheng Li <wuchengli@chromium.org>
Tested-by: Wu-cheng Li <wuchengli@chromium.org>
Reviewed-by: Owen Lin <owenlin@chromium.org>
diff --git a/client/site_tests/video_PlaybackPerf/control.h264.arc b/client/site_tests/video_PlaybackPerf/control.h264.arc
index 3cec927..02e15f7 100644
--- a/client/site_tests/video_PlaybackPerf/control.h264.arc
+++ b/client/site_tests/video_PlaybackPerf/control.h264.arc
@@ -21,7 +21,7 @@
 hardware acceleration support.
 """
 
-VIDEO_NAME = 'traffic-1920x1080-8005020218f6b86bfa978e550d04956e.mp4'
+VIDEO_NAME = 'traffic/traffic-1920x1080-8005020218f6b86bfa978e550d04956e.mp4'
 VIDEO_DESCRIPTION = 'h264_1080p'
 job.run_test('video_PlaybackPerf', video_name=VIDEO_NAME,
              video_description=VIDEO_DESCRIPTION, arc_mode=ARC_MODE)
diff --git a/client/site_tests/video_PlaybackPerf/control.vp9.arc b/client/site_tests/video_PlaybackPerf/control.vp9.arc
index 2e46c4f..652c300 100644
--- a/client/site_tests/video_PlaybackPerf/control.vp9.arc
+++ b/client/site_tests/video_PlaybackPerf/control.vp9.arc
@@ -21,7 +21,7 @@
 hardware acceleration support.
 """
 
-VIDEO_NAME = 'traffic-1920x1080-83a1e5f8b7944577425f039034e64c76.vp9.webm'
+VIDEO_NAME = 'traffic/traffic-1920x1080-83a1e5f8b7944577425f039034e64c76.vp9.webm'
 VIDEO_DESCRIPTION = 'vp9_1080p'
 job.run_test('video_PlaybackPerf', video_name=VIDEO_NAME,
              video_description=VIDEO_DESCRIPTION, arc_mode=ARC_MODE)