Removing Proj-TabletChrome since that is used for bugs/FRs within the Chrome browser.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3104d52a9c3e5eae67a1f2a294ad33e2e6c600bc

commit 3104d52a9c3e5eae67a1f2a294ad33e2e6c600bc
Author: Sammie Quon <sammiequon@google.com>
Date: Mon Aug 14 19:46:14 2017

shelf: Make back button work in rtl languages.

Back button now does the right thing in RTL languages. It still does not work with voice interaction animation overlay but that is left untouched due to voice interaction animation overlay not working in RTL by itself.

Bug:  751280 
Test: ash_unittests "BackButtonAppListButtonTest*"
Change-Id: I8cd595bbf076beb2383fa1324a9f4a217ca44536
Reviewed-on: https://chromium-review.googlesource.com/597107
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#494139}
[modify] https://crrev.com/3104d52a9c3e5eae67a1f2a294ad33e2e6c600bc/ash/resources/vector_icons/shelf_back.1x.icon
[modify] https://crrev.com/3104d52a9c3e5eae67a1f2a294ad33e2e6c600bc/ash/resources/vector_icons/shelf_back.icon
[modify] https://crrev.com/3104d52a9c3e5eae67a1f2a294ad33e2e6c600bc/ash/shelf/app_list_button.cc
[modify] https://crrev.com/3104d52a9c3e5eae67a1f2a294ad33e2e6c600bc/ash/shelf/app_list_button_unittest.cc

This bug requires manual review: M61 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Approving merge to M61 Chrome OS.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0bc37e9f88e353e7e9e3538e50bea42c221b8ad4

commit 0bc37e9f88e353e7e9e3538e50bea42c221b8ad4
Author: Vladislav Kaznacheev <kaznacheev@google.com>
Date: Thu Aug 17 20:29:50 2017

shelf: Make back button work in rtl languages.

Back button now does the right thing in RTL languages. It still does not work with voice interaction animation overlay but that is left untouched due to voice interaction animation overlay not working in RTL by itself.

TBR=sammiequon@google.com

(cherry picked from commit 3104d52a9c3e5eae67a1f2a294ad33e2e6c600bc)

Bug:  751280 
Test: ash_unittests "BackButtonAppListButtonTest*"
Change-Id: I8cd595bbf076beb2383fa1324a9f4a217ca44536
Reviewed-on: https://chromium-review.googlesource.com/597107
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#494139}
Reviewed-on: https://chromium-review.googlesource.com/619451
Reviewed-by: Vladislav Kaznacheev <kaznacheev@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#640}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/0bc37e9f88e353e7e9e3538e50bea42c221b8ad4/ash/resources/vector_icons/shelf_back.1x.icon
[modify] https://crrev.com/0bc37e9f88e353e7e9e3538e50bea42c221b8ad4/ash/resources/vector_icons/shelf_back.icon
[modify] https://crrev.com/0bc37e9f88e353e7e9e3538e50bea42c221b8ad4/ash/shelf/app_list_button.cc
[modify] https://crrev.com/0bc37e9f88e353e7e9e3538e50bea42c221b8ad4/ash/shelf/app_list_button_unittest.cc