The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9fd2cbbc47922191bd1d89977a26a7c0ad2983ee

commit 9fd2cbbc47922191bd1d89977a26a7c0ad2983ee
Author: Ryan Landay <rlanday@chromium.org>
Date: Fri Jun 01 21:49:24 2018

Clean up tab focus animation in new Android horizontal tab switcher

The new non-overlapping horizontal tab switcher on Android currently does a
weird boomerang/swooshing effect when you select a tab because we're
incorrectly doing a scroll offset animation that's only needed for the
overlapping tab switcher. This CL removes this animation for the non-overlapping
tab switcher to correct this effect.

Bug:  848892 ,831359
Change-Id: I1ef73960ed6189ef70cd8375a098131b7c03e245
Reviewed-on: https://chromium-review.googlesource.com/1083218
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Ryan Landay <rlanday@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563812}
[modify] https://crrev.com/9fd2cbbc47922191bd1d89977a26a7c0ad2983ee/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/phone/stack/StackAnimationLandscape.java

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/545828780f3517a89ce467fa0895087e42ba13c8

commit 545828780f3517a89ce467fa0895087e42ba13c8
Author: Ryan Landay <rlanday@chromium.org>
Date: Fri Jun 01 21:51:17 2018

Clean up tab focus animation in new Android horizontal tab switcher

The new non-overlapping horizontal tab switcher on Android currently does a
weird boomerang/swooshing effect when you select a tab because we're
incorrectly doing a scroll offset animation that's only needed for the
overlapping tab switcher. This CL removes this animation for the non-overlapping
tab switcher to correct this effect.

Bug:  848892 ,831359
Change-Id: I1ef73960ed6189ef70cd8375a098131b7c03e245
Reviewed-on: https://chromium-review.googlesource.com/1083218
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Ryan Landay <rlanday@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#563812}(cherry picked from commit 9fd2cbbc47922191bd1d89977a26a7c0ad2983ee)
Reviewed-on: https://chromium-review.googlesource.com/1083512
Reviewed-by: Ryan Landay <rlanday@chromium.org>
Cr-Commit-Position: refs/branch-heads/3440@{#102}
Cr-Branched-From: 010ddcfda246975d194964ccf20038ebbdec6084-refs/heads/master@{#561733}
[modify] https://crrev.com/545828780f3517a89ce467fa0895087e42ba13c8/chrome/android/java/src/org/chromium/chrome/browser/compositor/layouts/phone/stack/StackAnimationLandscape.java