The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/148ae8075bfdc22e122b3307d3344337db12d00c

commit 148ae8075bfdc22e122b3307d3344337db12d00c
Author: sky <sky@chromium.org>
Date: Fri Jan 06 21:53:27 2017

Makes mash use ChromeNativeAppWindowViewsAura

Mash should really use ChromeNativeAppWindowViewsAuraAsh, but that
depends upon a bunch of types in ash. So, make mash use
ChromeNativeAppWindowViewsAura, which isn't perfect, but at least it
doesn't crash.

BUG= 679028 
TEST=none
R=msw@chromium.org

Review-Url: https://codereview.chromium.org/2617923004
Cr-Commit-Position: refs/heads/master@{#442067}

[modify] https://crrev.com/148ae8075bfdc22e122b3307d3344337db12d00c/chrome/browser/ui/views/apps/chrome_app_window_client_views_chromeos.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f49f1ae7c8896402177da53ff27d53be29fcca5c

commit f49f1ae7c8896402177da53ff27d53be29fcca5c
Author: msw <msw@chromium.org>
Date: Mon Jan 30 18:08:25 2017

mash: Use ChromeNativeAppWindowViewsAuraAsh; workaround crashes.

Revert the ChromeNativeAppWindowViewsAura workaround.
Initialize the views::Widget::InitParams::mus_properties for mash.
(set the correct container, display id, and shelf item type)

Use ChromeNativeAppWindowViews's NonClientFrameView for panels too.
(ash::CustomFrameViewAsh and ash::PanelFrameView are still broken in mash)

BUG= 679028 , 672599 
TEST=chrome --mash panel windows are right-aligned.
R=sky@chromium.org

Review-Url: https://codereview.chromium.org/2665523002
Cr-Commit-Position: refs/heads/master@{#447014}

[modify] https://crrev.com/f49f1ae7c8896402177da53ff27d53be29fcca5c/chrome/browser/ui/views/apps/chrome_app_window_client_views_chromeos.cc
[modify] https://crrev.com/f49f1ae7c8896402177da53ff27d53be29fcca5c/chrome/browser/ui/views/apps/chrome_native_app_window_views_aura_ash.cc

I restored use of ChromeNativeAppWindowViewsAuraAsh, but mash still doesn't use CustomFrameViewAsh and PanelFrameView here (maybe it's okay as-is and should just rely on the wm-provided frame?), and there's a shelf visibility update that's skipped on mash. These are more minor details, but I'll leave this open for now.

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available. If you change it back, also remove the "Hotlist-Recharge-Cold" label.

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

I think the core issue here has been resolved.