The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/634e30f551f032ce930a65932c1bfad403c9c8d2

commit 634e30f551f032ce930a65932c1bfad403c9c8d2
Author: oshima <oshima@chromium.org>
Date: Tue Mar 28 16:23:08 2017

Make backdrop fully opaque

BUG= 705577 

Review-Url: https://codereview.chromium.org/2775353002
Cr-Commit-Position: refs/heads/master@{#460118}

[modify] https://crrev.com/634e30f551f032ce930a65932c1bfad403c9c8d2/ash/common/wm/maximize_mode/workspace_backdrop_delegate.cc

Your change meets the bar and is auto-approved for M58. Please go ahead and merge the CL to branch 3029 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), bhthompson@(ChromeOS), govind@(Desktop)

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

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b53a0d0ca06e4ef85adfcb8357a95fb33ebd6710

commit b53a0d0ca06e4ef85adfcb8357a95fb33ebd6710
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Thu Mar 30 01:26:51 2017

Make backdrop fully opaque

BUG= 705577 

Review-Url: https://codereview.chromium.org/2775353002
Cr-Commit-Position: refs/heads/master@{#460118}
(cherry picked from commit 634e30f551f032ce930a65932c1bfad403c9c8d2)

Review-Url: https://codereview.chromium.org/2780333002 .
Cr-Commit-Position: refs/branch-heads/3029@{#485}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}

[modify] https://crrev.com/b53a0d0ca06e4ef85adfcb8357a95fb33ebd6710/ash/common/wm/maximize_mode/workspace_backdrop_delegate.cc

Found that the backdrop doesn't cover entire display, so the wallpapper is visible through shelf. We need one more change.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f97f2a165d8806024a90c8ee3a9b68ee0a4d06da

commit f97f2a165d8806024a90c8ee3a9b68ee0a4d06da
Author: oshima <oshima@chromium.org>
Date: Mon Apr 03 07:07:14 2017

Fullscreen backdrop window for maximize mode

Regular window size is capped to be smaller than workarea.

BUG= 705577 , 706881 
TEST=manual

Review-Url: https://codereview.chromium.org/2792773002
Cr-Commit-Position: refs/heads/master@{#461379}

[modify] https://crrev.com/f97f2a165d8806024a90c8ee3a9b68ee0a4d06da/ash/common/wm/maximize_mode/workspace_backdrop_delegate.cc
[modify] https://crrev.com/f97f2a165d8806024a90c8ee3a9b68ee0a4d06da/ash/common/wm/maximize_mode/workspace_backdrop_delegate.h
[modify] https://crrev.com/f97f2a165d8806024a90c8ee3a9b68ee0a4d06da/ash/common/wm/workspace/workspace_layout_manager.cc
[modify] https://crrev.com/f97f2a165d8806024a90c8ee3a9b68ee0a4d06da/ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h
[modify] https://crrev.com/f97f2a165d8806024a90c8ee3a9b68ee0a4d06da/ash/common/wm/workspace/workspace_layout_manager_unittest.cc