[CompositeAfterPaint] Use layer offset to xform parent in hit test tests

In CompositeAfterPaint (CAP), cc::Layer::offset_to_transform_parent is
used instead of cc::Layer::position (which is only for the unused cc
property tree builder). This patch switches CAP to use the cc::Layer
offset and rebaselines the touch action rect tests.

Bug: 909749
Change-Id: I8ffd26007c1616d11b3caec0d63e0af1f1bbd274
Reviewed-on: https://chromium-review.googlesource.com/c/1403061
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621187}
11 files changed