Add additional tests for mouse lock.

-SameMouseLockMovement
-testMouseLockLostOnReload

TEST=none
BUG=130301
NOTRY=true
Review URL: https://chromiumcodereview.appspot.com/10443098

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@139861 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed