GitLab

Implements a three finger swipe gesture event for the aura Gesture Recognizer.

BUG=122807
TEST=SystemGestureEventFilterTest.TapOutsideRootWindow, GestureRecognizerTest.GestureEventThreeFingerSwipe


Review URL: http://codereview.chromium.org/10037012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132570 0039d316-1c4b-4281-b951-d872f2087c98