Actually marking M-55.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/98b66eba2a1509a2c7d2d6a4ecab6c270a761092

commit 98b66eba2a1509a2c7d2d6a4ecab6c270a761092
Author: dfalcantara <dfalcantara@chromium.org>
Date: Fri Nov 04 06:57:17 2016

[Blink] Display images on a dark background

Images displayed in a standalone main frame are now displayed
on a color that is almost, but not quite, entirely unlike black.
More specifically, all images will now be displayed on a #0E0E0E
page background, while transparent images are displayed on a
checkerboard image background.

Intent to implement:
https://docs.google.com/document/d/1wJPz4kn-9mEFs_ZEM0hAwwr-YzBdW-5hdX1-jkt81Ng/edit?usp=sharing

BUG= 650455 

Review-Url: https://codereview.chromium.org/2445413003
Cr-Commit-Position: refs/heads/master@{#429820}

[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/LayoutTests/TestExpectations
[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/LayoutTests/fast/images/exif-orientation-height-image-document-expected.png
[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/LayoutTests/fast/images/huge-image-viewport-scale-expected.txt
[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/LayoutTests/mhtml/image_document-expected.txt
[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/LayoutTests/mhtml/invalid-bad-boundary2-expected.txt
[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/LayoutTests/svg/custom/anchor-on-use-expected.svg
[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/Source/core/html/ImageDocument.cpp
[modify] https://crrev.com/98b66eba2a1509a2c7d2d6a4ecab6c270a761092/third_party/WebKit/Source/core/html/ImageDocument.h

Just found that the CL I landed leaves a single pixel checkerboard pattern visible above and/or below images that are too wide and have to be shrunken down.  Ugh.  Investigating.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/73877006b0b2cda3b6906f376f852d58b0c2ba4b

commit 73877006b0b2cda3b6906f376f852d58b0c2ba4b
Author: dfalcantara <dfalcantara@chromium.org>
Date: Wed Nov 09 00:08:42 2016

[Download Home] Custom tab backgrounds

* Background and toolbar of the Custom Tab should be
  off-black for images and black for all other media.

* Add an extra to the Intent that allows changing the
  background.

* Overrides ChromeActivity methods so that the colors
  can be set at the right times.

* Add a method to disable the toolbar shadow.

BUG= 650455 

Review-Url: https://codereview.chromium.org/2484053002
Cr-Commit-Position: refs/heads/master@{#430780}

[modify] https://crrev.com/73877006b0b2cda3b6906f376f852d58b0c2ba4b/chrome/android/java/res/values/colors.xml
[modify] https://crrev.com/73877006b0b2cda3b6906f376f852d58b0c2ba4b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
[modify] https://crrev.com/73877006b0b2cda3b6906f376f852d58b0c2ba4b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabIntentDataProvider.java
[modify] https://crrev.com/73877006b0b2cda3b6906f376f852d58b0c2ba4b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.java
[modify] https://crrev.com/73877006b0b2cda3b6906f376f852d58b0c2ba4b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadFilter.java
[modify] https://crrev.com/73877006b0b2cda3b6906f376f852d58b0c2ba4b/chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarManager.java

Should be mostly in now.  Some animation jankiness can be tackled on the animation bug.

dfalcantara@ : Does this fix the issue mentioned in comment#4 ? I still see the single pixel checkerboard pattern on 56.0.2919.3

Screenshot - http://go/chrome-androidlogs1/6/650455

Unrelated.  See 662593.

Well, related, but actually a bug in Blink.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e7363d48df2e71ed9111b7ef8174470bc66af78b

commit e7363d48df2e71ed9111b7ef8174470bc66af78b
Author: Quinten Yearsley <qyearsley@google.com>
Date: Tue Nov 22 17:12:08 2016

Auto-rebaseline for r433767

https://chromium.googlesource.com/chromium/src/+/69b378ee1

BUG= 650455 
TBR=fmalita@chromium.org

Review URL: https://codereview.chromium.org/2522893002 .

Cr-Commit-Position: refs/heads/master@{#433897}

[modify] https://crrev.com/e7363d48df2e71ed9111b7ef8174470bc66af78b/third_party/WebKit/LayoutTests/TestExpectations
[modify] https://crrev.com/e7363d48df2e71ed9111b7ef8174470bc66af78b/third_party/WebKit/LayoutTests/images/exif-orientation-height-image-document-expected.txt
[modify] https://crrev.com/e7363d48df2e71ed9111b7ef8174470bc66af78b/third_party/WebKit/LayoutTests/images/huge-image-viewport-scale-expected.txt
[modify] https://crrev.com/e7363d48df2e71ed9111b7ef8174470bc66af78b/third_party/WebKit/LayoutTests/mhtml/image_document-expected.txt
[modify] https://crrev.com/e7363d48df2e71ed9111b7ef8174470bc66af78b/third_party/WebKit/LayoutTests/mhtml/invalid-bad-boundary2-expected.txt

Thanks dfalcantara@ ! Marking this bug as verified then.