Moving this nonessential bug to the next milestone.

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

satorux@ any chance someone on your team can investigate this one?

Yingbing, can you please take a look at this? Thanks.

The root cause is when exit tablet mode. OS will close inputview window immediately.
And inputview window doesn't fire "unload" event or the event is fired but there not enough time to send the message to background. (Background doesn't receive the visibility changed event)
I suggest to add new IME API to when the device mode changed.

hi Lan, can you please help to implement a private API so that the issue can be solved in extension JS?

The API could be an event: chrome.virtualKeyboardPrivate.onKeyboardDestroyed().

This issue is Pri-1 but has already been moved once. Lowering the priority and moving to the next milestone.

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/+/169fcec510510b51122341c9471730f8a7b1c029

commit 169fcec510510b51122341c9471730f8a7b1c029
Author: azurewei <azurewei@chromium.org>
Date: Wed Sep 14 17:31:13 2016

Add virtualKeyboardPrivate.onKeyboardClosed API

The added API will be fired when the virtual keyboard window has been closed, for example, this can happen when turning off on-screen keyboard or exiting tablet mode.

IME extensions rely on input view's visibility changing event to do some work such as hide candidate window. While, when exiting tablet mode, OS will close input view window immediately but doesn't fire 'unload' event, so the IME extensions won't receive the visibility changed event.

Thus, we add this API to notify the extensions the keyboard closed event.

BUG= 619763 
TEST=KeyboardControllerTest.CloseKeyboard

Review-Url: https://codereview.chromium.org/2122873002
Cr-Commit-Position: refs/heads/master@{#418603}

[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/app_list/app_list_presenter_delegate.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/app_list/app_list_presenter_delegate.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/shelf/shelf_layout_manager.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/shelf/shelf_layout_manager.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/dock/docked_window_layout_manager.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/dock/docked_window_layout_manager.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/panels/panel_layout_manager.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/panels/panel_layout_manager.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/system_modal_container_layout_manager.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/system_modal_container_layout_manager.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/workspace/workspace_layout_manager.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/common/wm/workspace/workspace_layout_manager.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/wm/lock_layout_manager.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ash/wm/lock_layout_manager.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/chrome/browser/chromeos/login/lock/webui_screen_locker.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/chrome/browser/chromeos/login/lock/webui_screen_locker.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/chrome/browser/chromeos/login/ui/login_display_host_impl.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/chrome/browser/chromeos/login/ui/login_display_host_impl.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/chrome/browser/ui/ash/chrome_keyboard_ui.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/components/arc/ime/arc_ime_service.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/components/arc/ime/arc_ime_service.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/extensions/browser/extension_event_histogram_value.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/extensions/common/api/virtual_keyboard_private.json
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/tools/metrics/histograms/histograms.xml
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ui/keyboard/keyboard_controller.cc
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ui/keyboard/keyboard_controller_observer.h
[modify] https://crrev.com/169fcec510510b51122341c9471730f8a7b1c029/ui/keyboard/keyboard_controller_unittest.cc

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/overlays/chromeos-overlay/+/aa55dcb7a68a6ba3e49a0b6ebe3fef2ffc59434b

commit aa55dcb7a68a6ba3e49a0b6ebe3fef2ffc59434b
Author: Shu Chen <shuchen@google.com>
Date: Thu Dec 01 07:50:46 2016

verified on 58.0.3029.51