Fix closing the window by clicking the X.
Fix closing the window by clicking the X.

I'm splitting this change out from my earlier CL because it's a more serious regression and I am still solving the capture issues separately.

http://crbug.com/76144
TEST=see bug
TBR=sky
Review URL: http://codereview.chromium.org/6677081

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@78387 0039d316-1c4b-4281-b951-d872f2087c98

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