The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e6141a8e20f4a6c85c6742925ddb66be242dfca1

commit e6141a8e20f4a6c85c6742925ddb66be242dfca1
Author: Henrik Grunell <grunell@chromium.org>
Date: Thu Dec 14 09:53:00 2017

Add Failure to test expectations for styles-update-from-js.js.

Fails on Win7.

TBR=chenwilliam@chroimum.org

Bug: 794869
Change-Id: Ie32fd675197bd608ce8a236ba0401966f3371b72
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/826628
Reviewed-by: Henrik Grunell <grunell@chromium.org>
Commit-Queue: Henrik Grunell <grunell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524033}
[modify] https://crrev.com/e6141a8e20f4a6c85c6742925ddb66be242dfca1/third_party/WebKit/LayoutTests/TestExpectations

This has just appeared on Mac as well, with the same stack:
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Mac10.11%20%28dbg%29/builds/11397



12:37:52.549 54049 worker/0 http/tests/devtools/elements/styles-4/styles-update-from-js.js output stderr lines:
12:37:52.550 54049   objc[56313]: Class MockCrApp is implemented in both /b/s/w/ir/out/Debug/libtest_runner.dylib and /b/s/w/ir/out/Debug/Content Shell.app/Contents/Frameworks/Content Shell Framework.framework/Content Shell Framework. One of the two will be used. Which one is undefined.
12:37:52.550 54049   objc[56313]: Class CocoaTestHelperWindow is implemented in both /b/s/w/ir/out/Debug/libtest_runner.dylib and /b/s/w/ir/out/Debug/Content Shell.app/Contents/Frameworks/Content Shell Framework.framework/Content Shell Framework. One of the two will be used. Which one is undefined.
12:37:52.550 54049   objc[56314]: Class MockCrApp is implemented in both /b/s/w/ir/out/Debug/libtest_runner.dylib and /b/s/w/ir/out/Debug/Content Shell.app/Contents/Frameworks/Content Shell Framework.framework/Content Shell Framework. One of the two will be used. Which one is undefined.
12:37:52.550 54049   objc[56314]: Class CocoaTestHelperWindow is implemented in both /b/s/w/ir/out/Debug/libtest_runner.dylib and /b/s/w/ir/out/Debug/Content Shell.app/Contents/Frameworks/Content Shell Framework.framework/Content Shell Framework. One of the two will be used. Which one is undefined.
12:37:52.550 54049   [56313:775:1214/123746.603496:WARNING:vt_video_decode_accelerator_mac.cc(178)] Failed to create VTDecompressionSession: Error Domain=NSOSStatusErrorDomain Code=-8973 "codecOpenErr" (-8973)
12:37:52.550 54049   [56313:775:1214/123746.603884:WARNING:vt_video_decode_accelerator_mac.cc(200)] Failed to create hardware VideoToolbox session
12:37:52.550 54049   [56313:775:1214/123746.619259:ERROR:vt_video_encode_accelerator_mac.cc(517)]  VTCompressionSessionCreate failed: -12908
12:37:52.550 54049   objc[56315]: Class MockCrApp is implemented in both /b/s/w/ir/out/Debug/libtest_runner.dylib and /b/s/w/ir/out/Debug/Content Shell.app/Contents/Frameworks/Content Shell Framework.framework/Content Shell Framework. One of the two will be used. Which one is undefined.
12:37:52.550 54049   objc[56315]: Class CocoaTestHelperWindow is implemented in both /b/s/w/ir/out/Debug/libtest_runner.dylib and /b/s/w/ir/out/Debug/Content Shell.app/Contents/Frameworks/Content Shell Framework.framework/Content Shell Framework. One of the two will be used. Which one is undefined.
12:37:52.550 54049   [56314:775:1214/123749.010611:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for 'all'.
12:37:52.550 54049   [56314:775:1214/123749.010907:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for 'background-repeat-x'.
12:37:52.550 54049   [56314:775:1214/123749.010966:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for 'background-repeat-y'.
12:37:52.550 54049   [56314:775:1214/123749.012727:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for 'page'.
12:37:52.550 54049   [56314:775:1214/123749.012898:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for 'quotes'.
12:37:52.550 54049   [56314:775:1214/123749.013261:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for 'size'.
12:37:52.551 54049   [56314:775:1214/123749.014082:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-font-size-delta'.
12:37:52.551 54049   [56314:775:1214/123749.014497:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-mask-repeat-x'.
12:37:52.551 54049   [56314:775:1214/123749.014555:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-mask-repeat-y'.
12:37:52.551 54049   [56314:775:1214/123749.014707:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-perspective-origin-x'.
12:37:52.551 54049   [56314:775:1214/123749.014765:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-perspective-origin-y'.
12:37:52.551 54049   [56314:775:1214/123749.014987:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-transform-origin-x'.
12:37:52.551 54049   [56314:775:1214/123749.015040:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-transform-origin-y'.
12:37:52.551 54049   [56314:775:1214/123749.015079:ERROR:CSSComputedStyleDeclaration.cpp(188)] Blink does not yet implement getComputedStyle for '-webkit-transform-origin-z'.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ae7ff3a87a8e4ca9e6abaeffe52f3615b876a53e

commit ae7ff3a87a8e4ca9e6abaeffe52f3615b876a53e
Author: Henrik Grunell <grunell@chromium.org>
Date: Fri Dec 15 11:56:49 2017

Disable flaky http/tests/devtools/elements/styles-4/styles-update-from-js.js on Mac

TBR=chenwilliam@chroimum.org

Bug: 794869
Change-Id: Ifd17f87b95a0ebd2977d9cdb24608b32fe9c449a
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/829133
Reviewed-by: Henrik Grunell <grunell@chromium.org>
Commit-Queue: Henrik Grunell <grunell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524364}
[modify] https://crrev.com/ae7ff3a87a8e4ca9e6abaeffe52f3615b876a53e/third_party/WebKit/LayoutTests/TestExpectations