compositing/transitions/singular-scale-transition.html flaky in Win7 Release
compositing/transitions/singular-scale-transition.html flaky in Win7 Release

Test sometimes flakes in Release Win7. Widen expectation to include
Release flake [ Failure Pass ] and Debug { Failure].

TBR=jochen@chromium.org
BUG=243888

Review URL: https://codereview.chromium.org/15845003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@151226 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs