Disable InstantExtendedTest.SearchDoesntReuseInstantTab on Mac too.

Disable InstantExtendedTest.SearchDoesntReuseInstantTab on Mac too.

InstantExtendedTest.SearchDoesntReuseInstantTab is flaky on all
platforms. It was already disabled on Windows/Linux so here's an example
Mac failure:
https://uberchromegw.corp.google.com/i/chromium.memory/builders/Mac%20ASan%2064%20Tests%20%281%29/builds/26984

TBR=treib@chromium.org
BUG=678975
Review-Url: https://codereview.chromium.org/2691653004
Cr-Commit-Position: refs/heads/master@{#449819}
Committed: https://chromium.googlesource.com/chromium/src/+/94eae2e63176106d8d7dac115c6de36b6a9563a5

[Bret, 2017-02-11 00:58:25]

The CQ bit was checked by bsep@chromium.org

[commit-bot: I haz the power, 2017-02-11 00:58:56]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-11 01:32:08]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486774705859980, "parent_rev":
"214a55c8dbf669d7d16e8693ffd93ae0d9d10182", "commit_rev":
"94eae2e63176106d8d7dac115c6de36b6a9563a5"}

[commit-bot: I haz the power, 2017-02-11 01:35:50]

Description was changed from

==========
Disable InstantExtendedTest.SearchDoesntReuseInstantTab on Mac too.

InstantExtendedTest.SearchDoesntReuseInstantTab is flaky on all
platforms. It was already disabled on Windows/Linux so here's an example
Mac failure:
https://uberchromegw.corp.google.com/i/chromium.memory/builders/Mac%20ASan%20...

TBR=treib@chromium.org
BUG=678975
==========

to

==========
Disable InstantExtendedTest.SearchDoesntReuseInstantTab on Mac too.

InstantExtendedTest.SearchDoesntReuseInstantTab is flaky on all
platforms. It was already disabled on Windows/Linux so here's an example
Mac failure:
https://uberchromegw.corp.google.com/i/chromium.memory/builders/Mac%20ASan%20...

TBR=treib@chromium.org
BUG=678975

Review-Url: https://codereview.chromium.org/2691653004
Cr-Commit-Position: refs/heads/master@{#449819}
Committed:
https://chromium.googlesource.com/chromium/src/+/94eae2e63176106d8d7dac115c6d...
==========

[commit-bot: I haz the power, 2017-02-11 01:35:52]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/94eae2e63176106d8d7dac115c6d...