The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d0c60c75f187c789f4908371391acb67db86b0ec

commit d0c60c75f187c789f4908371391acb67db86b0ec
Author: Robert Liao <robliao@chromium.org>
Date: Thu Nov 30 18:45:20 2017

Make Externally Patched COM Calls Fail the ComInitCheckHook

Now that WebRTC has disabled these hooks we can fail builds that
previously patched COM. This ensures that the hook is running where
we expect it to run instead of failing silently.

BUG=  737090  

Change-Id: I28b6f8203ecff3c3f54396848a70c78a17c9055e
Reviewed-on: https://chromium-review.googlesource.com/801250
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520618}
[modify] https://crrev.com/d0c60c75f187c789f4908371391acb67db86b0ec/base/win/com_init_check_hook.cc
[modify] https://crrev.com/d0c60c75f187c789f4908371391acb67db86b0ec/base/win/com_init_check_hook_unittest.cc