Add a chrome://flags for touchpad-overscroll-history-navigation.

After UI review, UI folks suggested to have a flag to turn "swipe to
navigation change" off although chrome://flags. Edge, Safari, and
Chrome(Mac) users asked Internet how to disable it (search for 'swipe
to navigate how to disable on [edge/mac/chrome]'. But Win 10 doesn't
have a specific setting. MacOS has the specific control and it works
for Chrome on Mac. Also we know the user can trigger this
unintentionally and be frustrated.

This flag might be maintained while we continue to improve it over time.

Bug: 647140
Change-Id: I8e855216fc834fd8f0acbb6011be12f13eda4cd7
Reviewed-on: https://chromium-review.googlesource.com/1047785
Commit-Queue: Jianpeng Chao <[email protected]>
Reviewed-by: Scott Violet <[email protected]>
Cr-Commit-Position: refs/heads/master@{#556832}
4 files changed