Change the result name of video_PlaybackPerf test in the dashboard.

Append the video resolution to the result name to distinguish test
results with different video resolutions.
Change the testname in status log by removing tag argument in control
files and change the corresponding entry in json config file.

BUG=chromium:391396
TEST=test on peach_pit

Change-Id: Ib8fad6c36b27353a085e50245b01293336b5b6ca
Reviewed-on: https://chromium-review.googlesource.com/212285
Reviewed-by: Owen Lin <owenlin@chromium.org>
Commit-Queue: Wen-Ding Li <wending@google.com>
Tested-by: Wen-Ding Li <wending@google.com>
4 files changed