The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fc82a9b25bfe303434842973712bfb2773b3c707

commit fc82a9b25bfe303434842973712bfb2773b3c707
Author: Findit <findit-for-me@appspot.gserviceaccount.com>
Date: Wed Jan 09 18:50:38 2019

Revert "Added a check for an selected image when toggling the editor"

This reverts commit 07d0aa4c7e0b5622ed434a29ec1f863b9fb6d4c4.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 621191 as the
culprit for flakes in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/flake/flake-culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyQwsSDEZsYWtlQ3VscHJpdCIxY2hyb21pdW0vMDdkMGFhNGM3ZTBiNTYyMmVkNDM0YTI5ZWMxZjg2M2I5ZmI2ZDRjNAw

Sample Failed Build: https://ci.chromium.org/buildbot/chromium.chromiumos/linux-chromeos-rel/18392

Sample Failed Step: non_single_process_mash_browser_tests

Sample Flaky Test: GalleryBrowserTest.DeleteImageWhileEditingOnDrive

Original change's description:
> Added a check for an selected image when toggling the editor
> 
> This provides a non-null check for the assert call.  When the assert
> call was being invoked with a null value, the edit mode was not being
> toggled.  Adding this in should allow deleting a single image to toggle
> the edit mode to off.
> 
> Bug:  912489 
> Change-Id: I88cfa830d9780a5f1da94710939d4243f231aa2b
> Reviewed-on: https://chromium-review.googlesource.com/c/1388812
> Reviewed-by: Noel Gordon <noel@chromium.org>
> Commit-Queue: Alexander Nohe <nohe@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#621191}

Change-Id: I232da9107f44addfa135131b0010cc2f68edf4f2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  912489 ,  920299 
Reviewed-on: https://chromium-review.googlesource.com/c/1403352
Cr-Commit-Position: refs/heads/master@{#621243}
[modify] https://crrev.com/fc82a9b25bfe303434842973712bfb2773b3c707/chrome/browser/chromeos/file_manager/gallery_browsertest.cc
[modify] https://crrev.com/fc82a9b25bfe303434842973712bfb2773b3c707/ui/file_manager/gallery/js/slide_mode.js
[modify] https://crrev.com/fc82a9b25bfe303434842973712bfb2773b3c707/ui/file_manager/integration_tests/gallery/photo_editor.js

Fix has landed in CL:1404061, haven't seen broken tests since.

(This was [Deputy Sheriff] while real Sheriff was in interview)