The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7bf8fdb21b7aec50889a725ceea2ebf72d484994

commit 7bf8fdb21b7aec50889a725ceea2ebf72d484994
Author: timvolodine <timvolodine@chromium.org>
Date: Wed May 18 22:12:42 2016

[Mac] Make deviceorientationabsolute implementation conform with the specification.

Absolute device orientation cannot be provided on Mac machines.
This patch makes sure that this is handled according to spec, i.e.
by propagating a one-off all-null event to let the web page know
no data can be provided for this event type.

spec:
http://w3c.github.io/deviceorientation/spec-source-orientation.html

TEST=http://timvolodine.github.io/deviceorientation-test/
BUG= 609094 

Review-Url: https://codereview.chromium.org/1915273003
Cr-Commit-Position: refs/heads/master@{#394569}

[modify] https://crrev.com/7bf8fdb21b7aec50889a725ceea2ebf72d484994/content/browser/device_sensors/data_fetcher_shared_memory_mac.cc