touch: Fix touch-event hit-testing for multiple touch points.

If the first touch press happens on a touch-region, but then moves out of that
region, and the second press happens again on the touch-region, then the hit-test
for the second finger would fail because the code used to only look at the position
of the first touch point. Fix that to make sure the position of the new touch
point is used for hit-testing.

BUG=321457
[email protected], [email protected]
[email protected] for content_tests.gypi

Review URL: https://codereview.chromium.org/76283003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238289 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed