commit 1bf0f75c1a34121eeda65dd83e38357cb2dc7e72
author Jinsuk Kim <jinsukkim@chromium.org> Fri Jan 18 00:05:30 2019
committer Commit Bot <commit-bot@chromium.org> Fri Jan 18 00:05:30 2019
tree 3964d8a92b34f8aa9fc360d69bec3c3134684d35
parent 2f9e29edea64e2ca098523131bfcaea72e453e74

Implement gesture navigation on Android

This CL enables side-wise overscroll gesture to trigger history
navigation.

Main UI implementation resides in chrome/browser/gesturenav/.
They are based on swiperefresh package (org.chromium.third_party
.android.swiperefresh), modified to support arrow widget for side
gesture, instead of pull-to-refresh with spinning ring.

Among the new classes, |SideSlideLayout| is the main FrameLayout
that hosts all the UI, and turns the gesture into triggering action.
This is used directly by SwipeRefreshHandler which now expands to
support side navigation as well as pull-to-refresh action for
WebContents.

SideSlideLayout is also used by HistoryNavigationLayout. It is
inherited by several layout classes for native pages like ntp to
support side-wise history navigation under chrome/browser/ntp.

chrome/browser/suggestions/SuggestionsRecyclerView was updated
for these native pages to support the gesture as intended. The
native pages based on HistoryNavigationLayout is supposed to
handle TouchEvents that are not processed by its children to do
its job, but it does not have chances to process them since the
RecyclerView always claims to have handled them. As a workaround,
RecyclerView provides an API indicating if it consumed the
horizontal gesture or not. This is utilized by
HistoryNavigationLayout to respond (or ignore) user gesture to
initiate its UI.

chrome/browser/feed/FeeNewTabPage also needs to know the similar
info from its view hierarchy. This requires a corresponding
change https://chromium-review.googlesource.com/c/feed/+/1395377
(WIP) from feed library.

Bug: 865567
Binary-Size: Increase needed to implement a feature.
Change-Id: Iad92a1105c9888f0d8937c7d45abfe0be542f504
Reviewed-on: https://chromium-review.googlesource.com/c/1249530
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623921}