Fix a regression from r256851 that clicking the buttons have no effect when the window is inactive.

BUG=316731

Review URL: https://codereview.chromium.org/197283010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256921 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256921