CL up https://codereview.chromium.org/2850743002

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0b70e87ed73d1b64b4ba9acbc4615b6fba7094f7

commit 0b70e87ed73d1b64b4ba9acbc4615b6fba7094f7
Author: drott <drott@chromium.org>
Date: Mon May 01 03:44:53 2017

Test Variations GPOS mark to base placement

Add a reftest using an additional axis VM2B in the variabletest_box
font. The VM2B axis shifts the mark anchor to the left, leading to the
combining mark below box shifting right when the axis parameter is
adjusted from 0 to 1000. As the reference in the ref test, the font now
contains two additional glyphs N and O, which have fixed base anchors at
the middle and right position. A rendering of the M character showing
"m2b pos", followed by COMBINING SQUARE BELOW with VM2B 0, 500, 1000
applied must thus be equal to renderings of the N and O glyph with no
VM2B variation values applied.

BUG= 693065 
R=behdad, kojii

Review-Url: https://codereview.chromium.org/2850743002
Cr-Commit-Position: refs/heads/master@{#468276}

[add] https://crrev.com/0b70e87ed73d1b64b4ba9acbc4615b6fba7094f7/third_party/WebKit/LayoutTests/fast/text/variable-fonts/variable-gpos-m2b-expected.html
[add] https://crrev.com/0b70e87ed73d1b64b4ba9acbc4615b6fba7094f7/third_party/WebKit/LayoutTests/fast/text/variable-fonts/variable-gpos-m2b.html
[modify] https://crrev.com/0b70e87ed73d1b64b4ba9acbc4615b6fba7094f7/third_party/WebKit/LayoutTests/http/tests/resources/variabletest_box.ttf

Sheriff here.

This test appears to be failing on Mac 10.10 and 10.9:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Ftext%2Fvariable-fonts%2Fvariable-gpos-m2b.html&testType=webkit_tests

Adding failure expectation in https://codereview.chromium.org/2855803002

Recent failure on Mac 10.9: https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.9/builds/45697

Direct link to diff in layout test results from the above: https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Mac10_9/45697/layout-test-results/fast/text/variable-fonts/variable-gpos-m2b-diffs.html

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e84a36378d78316e10dd54398977d8f85a040a92

commit e84a36378d78316e10dd54398977d8f85a040a92
Author: suzyh <suzyh@chromium.org>
Date: Tue May 02 02:24:59 2017

Add failure expectation for variable-gpos-m2b.html

LayoutTests/fast/text/variable-fonts/variable-gpos-m2b.html
is failing on Mac.

TBR=drott@chromium.org
BUG= 693065 

Review-Url: https://codereview.chromium.org/2855803002
Cr-Commit-Position: refs/heads/master@{#468538}

[modify] https://crrev.com/e84a36378d78316e10dd54398977d8f85a040a92/third_party/WebKit/LayoutTests/TestExpectations

Thank you for marking this and sending the link, suzyh@. I'll try to address this.

 Issue 717039  has been merged into this issue.

Fixed in https://codereview.chromium.org/2858573002