Mark 4 virtual/gpu tests as timing out on Win
Mark 4 virtual/gpu tests as timing out on Win

The following tests are timing out on Win Debug:
virtual/gpu/fast/canvas/canvas-incremental-repaint.html [ Timeout ]
virtual/gpu/fast/canvas/canvas-strokeRect-gradient-shadow.html [ Timeout ]
virtual/gpu/fast/hidpi/image-set-out-of-order.html [ Timeout ]
virtual/gpu/fast/hidpi/image-set-without-specified-width.html [ Timeout ]

See log:
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29%282%29/builds/3808/steps/webkit_tests/logs/stdio

BUG=248415
TBR=alph@chromium.org

Review URL: https://codereview.chromium.org/16760005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@152180 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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