touch: Fix ctrl+taps for buttons on bookmark bar and toolbar.

Ctrl+Tapping on the buttons in bookmark bar/toolbar should open a new tab. But
since the callbacks looked only at the event-flags for the mouse-events, it
didn't work correctly for taps. This is a fix for that.

BUG=163377

Review URL: https://codereview.chromium.org/11419227

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170238 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed