mvanouwerkerk: could this be related to https://chromium-review.googlesource.com/c/595981?

Yes, it could be. I'll take a look.

Reverted patch in https://chromium-review.googlesource.com/c/602209. Should fix the flake.

Does not seem to be flaking any more.

The culprit CL was reverted, but I still need this fixed :-) Coming up.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9c406aaecb3a05fc6ea931e003fdcf2f3d58560c

commit 9c406aaecb3a05fc6ea931e003fdcf2f3d58560c
Author: Michael van Ouwerkerk <mvanouwerkerk@google.com>
Date: Tue Aug 22 10:17:36 2017

Add entry to test config for NTPCondensedLayout with small logo.

Fix some tests that don't handle the condensed layout well.

Bug: 720383,  752232 
Change-Id: I282b3fa1b2c97385ea3fbd7c68b2b76ed525c05d
Reviewed-on: https://chromium-review.googlesource.com/624155
Reviewed-by: Alexei Svitkine (very slow) <asvitkine@chromium.org>
Reviewed-by: Nicolas Dossou-Gbété <dgn@chromium.org>
Commit-Queue: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496268}
[modify] https://crrev.com/9c406aaecb3a05fc6ea931e003fdcf2f3d58560c/chrome/android/javatests/src/org/chromium/chrome/browser/ntp/NewTabPageTest.java
[modify] https://crrev.com/9c406aaecb3a05fc6ea931e003fdcf2f3d58560c/chrome/android/javatests/src/org/chromium/chrome/browser/ntp/cards/NewTabPageRecyclerViewTest.java
[modify] https://crrev.com/9c406aaecb3a05fc6ea931e003fdcf2f3d58560c/testing/variations/fieldtrial_testing_config.json