[Contextual Search] Fix flaky tests

[Contextual Search] Fix flaky tests

Attempt to fix ContextualSearchManagerTest#testImageControl() by running
calls to the ContextualSearchImageControl on the UI thread. Also add
@RetryOnFailure to #testTapOnRoleIgnored().

BUG=669405, 669565
Committed: https://crrev.com/178b21a3089c78d3d4dbd3ccdcb7b967959ecf5a
Cr-Commit-Position: refs/heads/master@{#435040}

[Theresa, 2016-11-29 18:13:25]

The CQ bit was checked by twellington@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-29 18:13:49]

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

[Theresa, 2016-11-29 18:13:59]

twellington@chromium.org changed reviewers:
+ donnd@chromium.org

[Theresa, 2016-11-29 18:13:59]

ptal

[Donn Denman, 2016-11-29 18:16:50]

LGTM, thanks!

[Theresa, 2016-11-29 18:23:24]

The CQ bit was unchecked by twellington@chromium.org

[Theresa, 2016-11-29 18:23:25]

The CQ bit was checked by twellington@chromium.org

[commit-bot: I haz the power, 2016-11-29 18:23:36]

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, 2016-11-29 18:43:35]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480443805487060, "parent_rev":
"26f0b00fc813bd83bd05009252a85528d840471a", "commit_rev":
"afe30b218867b458c1a915a109631958cb9e9cd2"}

[commit-bot: I haz the power, 2016-11-29 18:44:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-29 18:46:50]

Description was changed from

==========
[Contextual Search] Fix flaky tests

Attempt to fix ContextualSearchManagerTest#testImageControl() by running
calls to the ContextualSearchImageControl on the UI thread. Also add
@RetryOnFailure to #testTapOnRoleIgnored().

BUG=669405,669565
==========

to

==========
[Contextual Search] Fix flaky tests

Attempt to fix ContextualSearchManagerTest#testImageControl() by running
calls to the ContextualSearchImageControl on the UI thread. Also add
@RetryOnFailure to #testTapOnRoleIgnored().

BUG=669405,669565

Committed: https://crrev.com/178b21a3089c78d3d4dbd3ccdcb7b967959ecf5a
Cr-Commit-Position: refs/heads/master@{#435040}
==========

[commit-bot: I haz the power, 2016-11-29 18:46:51]

Patchset 1 (id:??) landed as
https://crrev.com/178b21a3089c78d3d4dbd3ccdcb7b967959ecf5a
Cr-Commit-Position: refs/heads/master@{#435040}