The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a73bfcdab75e5ae85d3d97af584dacacd5c0431d

commit a73bfcdab75e5ae85d3d97af584dacacd5c0431d
Author: Ryan Landay <rlanday@chromium.org>
Date: Fri Jun 01 15:44:14 2018

Fix snapping in Android horizontal tab switcher when reloading from cold start

We currently have a bug in the new horizontal tab switcher on Android where if
tabs get reloaded after a cold start, the snap distance is not set properly, so
the snapping behavior doesn't work properly. The fix is to update the snap
distance in NonOverlappingStack#notifySizeChanged() in addition to
contextChanged() (apparently when reloading tabs, contextChanged() is not called
again after the StackLayout's size is properly set).

Bug:  846961 , 831359
Change-Id: I8c1be9f38889d6d1c45adefeb51af30d6a8bb4e3
Reviewed-on: https://chromium-review.googlesource.com/1081091
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Ryan Landay <rlanday@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563647}
[modify] https://crrev.com/a73bfcdab75e5ae85d3d97af584dacacd5c0431d/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/phone/stack/NonOverlappingStack.java

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2b5a6340325f497c5dab3bf74646327775805832

commit 2b5a6340325f497c5dab3bf74646327775805832
Author: Ryan Landay <rlanday@chromium.org>
Date: Fri Jun 01 17:55:41 2018

Fix snapping in Android horizontal tab switcher when reloading from cold start

We currently have a bug in the new horizontal tab switcher on Android where if
tabs get reloaded after a cold start, the snap distance is not set properly, so
the snapping behavior doesn't work properly. The fix is to update the snap
distance in NonOverlappingStack#notifySizeChanged() in addition to
contextChanged() (apparently when reloading tabs, contextChanged() is not called
again after the StackLayout's size is properly set).

Bug:  846961 , 831359
Change-Id: I8c1be9f38889d6d1c45adefeb51af30d6a8bb4e3
Reviewed-on: https://chromium-review.googlesource.com/1081091
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Ryan Landay <rlanday@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#563647}(cherry picked from commit a73bfcdab75e5ae85d3d97af584dacacd5c0431d)
Reviewed-on: https://chromium-review.googlesource.com/1082852
Reviewed-by: Ryan Landay <rlanday@chromium.org>
Cr-Commit-Position: refs/branch-heads/3440@{#94}
Cr-Branched-From: 010ddcfda246975d194964ccf20038ebbdec6084-refs/heads/master@{#561733}
[modify] https://crrev.com/2b5a6340325f497c5dab3bf74646327775805832/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/phone/stack/NonOverlappingStack.java