Remove suppression for bug_88863a
Remove suppression for bug_88863a

I was able to reproduce this locally a couple of days ago
but now the leak is gone. Some recent patch must have fixed the issue.

BUG=88863
TEST=run AutomationProxyTest.GetBrowserWindowCount under valgrind.

Review URL: http://codereview.chromium.org/7910005

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@101380 0039d316-1c4b-4281-b951-d872f2087c98

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