Duplicate bug 740799

Thanks!

Discussed with min, alex offline, dedup for now.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2630b8cd26e2afb5caa9692cf024273b5e72d537

commit 2630b8cd26e2afb5caa9692cf024273b5e72d537
Author: Qiang Xu <warx@chromium.org>
Date: Wed Jul 26 22:45:26 2017

app_list: implement fade-out zones for all apps

changes:
(1) Make default contents size height fixed at 633px.
(2) Make suggestions container and indicator views paint to layer.
(3) Create and apply a mask layer, which has top and bottom 21px height
opacity gradient zones.

specs: https://screenshot.googleplex.com/hh1pbCRYHnV

TEST: tested with --enable-features=EnableFullscreenAppList flag
Bug:  741008 
Change-Id: Ieb882bbf04f9707e44e3999f6ba3f456e17a5eb0
Reviewed-on: https://chromium-review.googlesource.com/578496
Commit-Queue: Qiang(Joe) Xu <warx@chromium.org>
Reviewed-by: David Reveman <reveman@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489783}
[modify] https://crrev.com/2630b8cd26e2afb5caa9692cf024273b5e72d537/ui/app_list/views/apps_grid_view.cc
[modify] https://crrev.com/2630b8cd26e2afb5caa9692cf024273b5e72d537/ui/app_list/views/apps_grid_view.h
[modify] https://crrev.com/2630b8cd26e2afb5caa9692cf024273b5e72d537/ui/app_list/views/contents_view.cc

launcher cl for m61

Approving merge to M61 Chrome OS.

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a56957a2389025cadf77eb9b980c6c6e29c264e5

commit a56957a2389025cadf77eb9b980c6c6e29c264e5
Author: Maajid <maajid@chromium.org>
Date: Mon Jul 31 21:25:30 2017

app_list: implement fade-out zones for all apps

changes:
(1) Make default contents size height fixed at 633px.
(2) Make suggestions container and indicator views paint to layer.
(3) Create and apply a mask layer, which has top and bottom 21px height
opacity gradient zones.

specs: https://screenshot.googleplex.com/hh1pbCRYHnV

TBR=warx@chromium.org

(cherry picked from commit 2630b8cd26e2afb5caa9692cf024273b5e72d537)

TEST: tested with --enable-features=EnableFullscreenAppList flag
Bug:  741008 
Change-Id: Ieb882bbf04f9707e44e3999f6ba3f456e17a5eb0
Reviewed-on: https://chromium-review.googlesource.com/578496
Commit-Queue: Qiang(Joe) Xu <warx@chromium.org>
Reviewed-by: David Reveman <reveman@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#489783}
Reviewed-on: https://chromium-review.googlesource.com/594889
Reviewed-by: Vadim Tryshev <vadimt@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#185}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/a56957a2389025cadf77eb9b980c6c6e29c264e5/ui/app_list/views/apps_grid_view.cc
[modify] https://crrev.com/a56957a2389025cadf77eb9b980c6c6e29c264e5/ui/app_list/views/apps_grid_view.h
[modify] https://crrev.com/a56957a2389025cadf77eb9b980c6c6e29c264e5/ui/app_list/views/contents_view.cc