tree 8e3da9949c3fdbc296405440cca0f64ea725af0c
parent 906f3a0a929968a8725e6a2dae7fe1b5f39f02c4
author Amirhossein Simjour <asimjour@google.com> 1461258960 -0400
committer chrome-bot <chrome-bot@chromium.org> 1461959662 -0700

Pinch gesture is modified to use product(dz) instead of sum(dz)

Sum(dz) is replaced with product of max of (dz, 1/dz). As a result,
the PinchValidator matches the actual pinch ratio. Moreover, it would
be easier to compare zoom-in and zoom-out gestures.

BUG=none
TEST=CL:340186
CQ-DEPEND=CL:340186

Change-Id: Idd53531fefcf6778af5ba70a39039e5f4b9e24e5
Reviewed-on: https://chromium-review.googlesource.com/340250
Commit-Ready: Amirhossein Simjour <asimjour@chromium.org>
Tested-by: Amirhossein Simjour <asimjour@chromium.org>
Reviewed-by: Dennis Kempin <denniskempin@google.com>