Callstack:
#0 0x7fde495ac24c base::debug::StackTrace::StackTrace()
#1 0x7fde495abd41 base::debug::(anonymous namespace)::StackDumpSignalHandler()
#2 0x7fde497350c0 <unknown>
#3 0x7fde44ee2e40 <unknown>
#4 0x7fde438157f2 ash::HeaderView::OnImmersiveRevealStarted()
#5 0x7fde43434d70 ash::ImmersiveFullscreenController::SetEnabled()
#6 0x556cd986d3f8 ChromeNativeAppWindowViewsAuraAsh::CreateNonClientFrameView()
#7 0x7fde43f2ea7d views::Widget::CreateNonClientFrameView()
#8 0x7fde43f2ce83 views::Widget::Init()
#9 0x556cd98a19aa ChromeNativeAppWindowViews::InitializeDefaultWindow()
#10 0x556cd98a29b0 ChromeNativeAppWindowViews::InitializeWindow()
#11 0x556cd986c322 ChromeNativeAppWindowViewsAuraAsh::InitializeWindow()
#12 0x556cd9a66eeb native_app_window::NativeAppWindowViews::Init()
#13 0x556cd97a5ba3 ChromeAppWindowClient::CreateNativeAppWindowImpl()
#14 0x556cd7a39733 extensions::AppWindow::Init()
#15 0x556cd7b19fba extensions::AppWindowCreateFunction::Run()
#16 0x556cd7a5cdb2 ExtensionFunction::RunWithValidation()
#17 0x556cd7a5f4bb extensions::ExtensionFunctionDispatcher::DispatchWithCallbackInternal()
#18 0x556cd7a5f05f extensions::ExtensionFunctionDispatcher::Dispatch()
#19 0x556cd7a838ea extensions::ExtensionWebContentsObserver::OnRequest()

Locally confirmed that https://chromium-review.googlesource.com/c/chromium/src/+/972677 caused this regression. 

Oshima, can you take a look?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/439fd0c576787f0f0e8cf4546a2c6fca05f9e592

commit 439fd0c576787f0f0e8cf4546a2c6fca05f9e592
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Sat Mar 24 01:39:43 2018

Fix crash when the immesriv mode is enabled during initialization

This is a temp fix. It looks like it's trying to reveal first when
created, but it doesn't work that way. This could be either regression,
or wrong, and I'll look into separately.

BUG= 825260 

Change-Id: Idc605ef9f42b48b847c3bc562ebd1d9a3a0c33c6
Reviewed-on: https://chromium-review.googlesource.com/978891
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#545657}
[modify] https://crrev.com/439fd0c576787f0f0e8cf4546a2c6fca05f9e592/ash/frame/header_view.cc

Issue 837000 has been merged into this issue.

The CL that caused the problem was merged (crrev.com/c/1007978) so we need to merge the fix as well.

this affects the camera app too

warx@, could you please merge once approved?

It seems like the report/regression is M67, 
can you confirm merge-request (c#7) is for M66 ?

fwiw, i didn't see this issue when i was on M65 (Product Version: 65.0.3325.199 beta ,CHROMEOS_RELEASE_VERSION: 10323.65.0 ), but now i'm seeing this problem consistently on M66 ( 66.0.3359.137 beta, CHROMEOS_RELEASE_DESCRIPTION: 10452.74.0 (Official Build) beta-channel soraka)

The culprit CL was merged to m66 by me. So we need to merge #4 in m67 and m66.

Oh sorry. #4 is already in m67. Then we just need to merge #4 in m66.

Hey all,

Just to confirm, it looks like this made it to the M66 stable channel release (66.0.3359.137). We're seeing reports that match the behavior:

Listnr
- https://listnr.corp.google.com/report/85385787862

Community
- https://productforums.google.com/forum/#!topic/chromebook-central/zgcVxVj3zRU

Thanks!

ping m66 merge approval

 Issue 839049  has been merged into this issue.

Issue 839456 has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9e48779947c9d31833600112fcbf4666e740748c

commit 9e48779947c9d31833600112fcbf4666e740748c
Author: Qiang Xu <warx@google.com>
Date: Thu May 03 19:07:16 2018

m66 merge: Fix crash when the immesriv mode is enabled during initialization

This is a temp fix. It looks like it's trying to reveal first when
created, but it doesn't work that way. This could be either regression,
or wrong, and I'll look into separately.

TBR=xdai@chromium.org
TBR=oshima@chromium.org

BUG= 825260 

(cherry picked from commit 439fd0c576787f0f0e8cf4546a2c6fca05f9e592)

Change-Id: Idc605ef9f42b48b847c3bc562ebd1d9a3a0c33c6
Reviewed-on: https://chromium-review.googlesource.com/978891
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#545657}
Reviewed-on: https://chromium-review.googlesource.com/1042865
Reviewed-by: Qiang Xu <warx@google.com>
Cr-Commit-Position: refs/branch-heads/3359@{#796}
Cr-Branched-From: 66afc5e5d10127546cc4b98b9117aff588b5e66b-refs/heads/master@{#540276}
[modify] https://crrev.com/9e48779947c9d31833600112fcbf4666e740748c/ash/frame/header_view.cc

Thanks! Fix merged to m66.