Gets mouse pointer to show again when existing fullscreen

My change at r232662 broke showing of the cursor when exiting
fullscreen. We always need to attempt to show the cursor, otherwise it
can get stuck hidden.

BUG=317496
TEST=see bug
R=ananta@chromium.org

Review URL: https://codereview.chromium.org/66333010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234741 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed