Layout test virtual/gpu/fast/hidpi/video-controls-in-hidpi.html fails on win
Layout test virtual/gpu/fast/hidpi/video-controls-in-hidpi.html fails on win

The test expectation lists Win7, but the test is still causing problems for
win_layout_rel, so I'm speculatively switching the platform to Win.

TBR=tomhudson@chromium.org
BUG=243543

Review URL: https://codereview.chromium.org/15725007

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@151485 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk