Fixes bug that could lead to mouse motion events percolating up to next window when they shouldn't. This manifested itself as buttons highlighting when the mose wasn't over them.
Fixes bug that could lead to mouse motion events percolating up to
next window when they shouldn't. This manifested itself as buttons
highlighting when the mose wasn't over them.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/454005

git-svn-id: http://src.chromium.org/svn/trunk/src@33321 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: b2eb39b4572c23d019e7724ab105d460e856c5c5
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser