Fix a bug which caused the OpenEventA function in kernelbase to not get patched. We were patching OpenEventW twice.

BUG=305815
R=rvargas@chromium.org, rvargas

Review URL: https://codereview.chromium.org/27256007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229192 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229192