I am no longer actively working on the Chromium project.

@tbuckley : Please confirm the Issue 

I am able to repro on 64.0.3261.0 canary. It is important that the Files.app is not pinned in the launcher before you open it.

+zork can someone on your team look into this for M64?

Daisy, could you have someone look into this?

Can repro the  issue 64 .0.3241.0/10038.0.0 kevin. But what I can see is not only this. The launcher is even not complete in this case, there is only suggested apps in the launcher. And many other issues, like the system tray is not complete either.
Updated to 64.0.3274.0/10151.0.0 don't have this issue.

#4, I think the indication of files.app (or other app) is missing by following steps,
1. Open the launcher
2. Click Files to open (not pinned on the shelf)
3. No indication of the Files even though it is opened.
4. Move the cursor to hover above the Files.app on the shelf. The indicator will be shown.

Indicator is missing if follow the steps at #7

Works well before this cl https://chromium-review.googlesource.com/c/chromium/src/+/661778

can you help take a look?

This bug is being caused due to a race condition at
https://cs.chromium.org/chromium/src/cc/layers/picture_layer.cc?l=130
where the recording scale is not set before the display item list is updated. Thus the solid color analysis fails and marks the app indicator as a 'no paint' region.

Working on a fix with unit tests.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a

commit 57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a
Author: F#m <malaykeshav@chromium.org>
Date: Thu Nov 30 01:49:35 2017

Fixes bug where recording scale factor was not set timely

This patch rearranges the statement to set the device scale factor for
recording source before the DisplayItemLists are updated and solid color
analysis is performed.

Adds unit test for this scenario.

Bug:  774939 
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: Iaa3c864f90636e042d26a89d443356cbd3dbd7ed
Component: Picture Layer, Recording source, solid color analysis
Reviewed-on: https://chromium-review.googlesource.com/795290
Reviewed-by: enne <enne@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Malay Keshav <malaykeshav@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520383}
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/benchmarks/rasterize_and_record_benchmark.cc
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/layers/picture_layer.cc
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/layers/picture_layer_impl_unittest.cc
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/layers/picture_layer_unittest.cc
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/layers/recording_source.cc
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/layers/recording_source.h
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/paint/oop_pixeltest.cc
[modify] https://crrev.com/57abc3e73cf8c9a0c9bc5f839d379cd41baacc7a/cc/test/fake_recording_source.h

[Auto-generated comment by a script] We noticed that this issue is targeted for M-64; it appears the fix may have landed after branch point, meaning a merge might be required. Please confirm if a merge is required here - if so add Merge-Request-64 label, otherwise remove Merge-TBD label. Thanks.

This bug requires manual review: We don't branch M64 until 2017-11-30.
Please contact the milestone owner if you have questions.
Owners: cmasso@(Android), cmasso@(iOS), kbleicher@(ChromeOS), abdulsyed@(Desktop)

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

Approving merge to M64 Chrome OS.

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

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

10176.34.0, 64.0.3282.65