Remove duplicated entry from LeakExpectations
Remove duplicated entry from LeakExpectations

Once should be enough...

TBR=schenney@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/771513003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@186516 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