This CL looks very suspicious: https://chromium-review.googlesource.com/c/chromium/src/+/700617 - removes early return with Android comment. Will revert.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0400d0014243549fb4fd84d6d4af1db3fc8fb252

commit 0400d0014243549fb4fd84d6d4af1db3fc8fb252
Author: Henrik Grunell <grunell@chromium.org>
Date: Mon Oct 09 15:06:42 2017

Revert "Don't recenter image document when URL bar hides"

This reverts commit a38acc8557b35c676bd5c936db0e1187bfa4ee57.

Reason for revert: breaks Android bot: https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Android%20%28Nexus4%29?numbuilds=200
 http://crbug.com/772860 

Original change's description:
> Don't recenter image document when URL bar hides
> 
> This patch changes the ImageDocument so that hiding the URL bar doesn't
> attempt to vertically re-center an image that's wider than the viewport.
> 
> Bug:  718515 
> Change-Id: I0b45beb011c2c8dbc6f095a0456774f6f5e041ff
> Reviewed-on: https://chromium-review.googlesource.com/700617
> Reviewed-by: David Trainor <dtrainor@chromium.org>
> Commit-Queue: David Bokan <bokan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#507079}

TBR=bokan@chromium.org,dtrainor@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug:  718515 ,  772860 
Change-Id: I5d82ae26c29068597bf90b29dbddcd9a46ba153d
Reviewed-on: https://chromium-review.googlesource.com/707075
Reviewed-by: Henrik Grunell <grunell@chromium.org>
Commit-Queue: Henrik Grunell <grunell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#507376}
[modify] https://crrev.com/0400d0014243549fb4fd84d6d4af1db3fc8fb252/third_party/WebKit/Source/core/html/ImageDocument.cpp
[modify] https://crrev.com/0400d0014243549fb4fd84d6d4af1db3fc8fb252/third_party/WebKit/Source/core/html/ImageDocumentTest.cpp
[modify] https://crrev.com/0400d0014243549fb4fd84d6d4af1db3fc8fb252/third_party/WebKit/Source/core/testing/sim/SimRequest.cpp
[modify] https://crrev.com/0400d0014243549fb4fd84d6d4af1db3fc8fb252/third_party/WebKit/Source/core/testing/sim/SimRequest.h

Sorry about that, I'll fix the test before relanding. I'll use  issue 718515  to track that.