CustomTabActivityTest: Mark testContextMenuEntriesForLink/Image flaky

CustomTabActivityTest: Mark testContextMenuEntriesForLink/Image flaky

These are the number #1 and #3 causes of flakiness on
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=chrome_public_test_apk&builder=chromium.android%3ALollipop%20Phone%20Tester
and often fail multiple times in a row, turning builds red despite
automated retries.

TBR=ianwen@chromium.org,wychen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=655970
Committed: https://crrev.com/4800fb054661d751e2effad3d5bc21322d2e8250
Cr-Commit-Position: refs/heads/master@{#434487}

[johnme, 2016-11-25 12:32:38]

The CQ bit was checked by johnme@chromium.org

[commit-bot: I haz the power, 2016-11-25 12:32:50]

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, 2016-11-25 12:33:21]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480077158790270, "parent_rev":
"40608b4bde22eec5d32b505c05f3ee7da0e34c88", "commit_rev":
"e93941307d3058b1368686c679b484c95f3fa196"}

[commit-bot: I haz the power, 2016-11-25 12:33:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-25 12:35:27]

Description was changed from

==========
CustomTabActivityTest: Mark testContextMenuEntriesForLink/Image flaky

These are the number #1 and #3 causes of flakiness on
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType...
and often fail multiple times in a row, turning builds red despite
automated retries.

TBR=ianwen@chromium.org,wychen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=655970
==========

to

==========
CustomTabActivityTest: Mark testContextMenuEntriesForLink/Image flaky

These are the number #1 and #3 causes of flakiness on
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType...
and often fail multiple times in a row, turning builds red despite
automated retries.

TBR=ianwen@chromium.org,wychen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=655970

Committed: https://crrev.com/4800fb054661d751e2effad3d5bc21322d2e8250
Cr-Commit-Position: refs/heads/master@{#434487}
==========

[commit-bot: I haz the power, 2016-11-25 12:35:28]

Patchset 1 (id:??) landed as
https://crrev.com/4800fb054661d751e2effad3d5bc21322d2e8250
Cr-Commit-Position: refs/heads/master@{#434487}