Revert of [Contextual Search] Fixes flaky test.

Revert of [Contextual Search] Fixes flaky test. (patchset #2 id:20001 of https://codereview.chromium.org/1669983003/ )

Reason for revert:
Reverting it, since it's making some bots to crash.

Original issue's description:
> [Contextual Search] Fixes and re-enables
> ContextualSearchManagerTest#testChainedSearchLoadsCorrectSearchTerm.
>
> Sometimes, the test tries to check the search term before
> the URL has started loading, which ends up resulting in
> failing to match the search term. The empty URL could also
> cause a crash when running the test, so this CL fixes the
> problem by waiting for the URL to match the search term,
> and also checks if the URL is null to prevent crashes.
>
> BUG=551711
>
> Committed: https://crrev.com/938110aa31eef055669b539990d7f87336b57633
> Cr-Commit-Position: refs/heads/master@{#373889}

TBR=twellington@chromium.org,donnd@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=551711
Committed: https://crrev.com/587347788a2e6a02b1a036ca49279fb3c6258b62
Cr-Commit-Position: refs/heads/master@{#373953}

[pedro (no code reviews), 2016-02-05 23:45:36]

Created Revert of [Contextual Search] Fixes flaky test.

[commit-bot: I haz the power, 2016-02-05 23:47:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1678573002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1678573002/1

[commit-bot: I haz the power, 2016-02-05 23:50:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-05 23:52:26]

Description was changed from

==========
Revert of [Contextual Search] Fixes flaky test. (patchset #2 id:20001 of
https://codereview.chromium.org/1669983003/ )

Reason for revert:
Reverting it, since it's making some bots to crash.

Original issue's description:
> [Contextual Search] Fixes and re-enables
> ContextualSearchManagerTest#testChainedSearchLoadsCorrectSearchTerm.
> 
> Sometimes, the test tries to check the search term before
> the URL has started loading, which ends up resulting in
> failing to match the search term. The empty URL could also
> cause a crash when running the test, so this CL fixes the
> problem by waiting for the URL to match the search term,
> and also checks if the URL is null to prevent crashes.
> 
> BUG=551711
> 
> Committed: https://crrev.com/938110aa31eef055669b539990d7f87336b57633
> Cr-Commit-Position: refs/heads/master@{#373889}

TBR=twellington@chromium.org,donnd@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=551711
==========

to

==========
Revert of [Contextual Search] Fixes flaky test. (patchset #2 id:20001 of
https://codereview.chromium.org/1669983003/ )

Reason for revert:
Reverting it, since it's making some bots to crash.

Original issue's description:
> [Contextual Search] Fixes and re-enables
> ContextualSearchManagerTest#testChainedSearchLoadsCorrectSearchTerm.
>
> Sometimes, the test tries to check the search term before
> the URL has started loading, which ends up resulting in
> failing to match the search term. The empty URL could also
> cause a crash when running the test, so this CL fixes the
> problem by waiting for the URL to match the search term,
> and also checks if the URL is null to prevent crashes.
>
> BUG=551711
>
> Committed: https://crrev.com/938110aa31eef055669b539990d7f87336b57633
> Cr-Commit-Position: refs/heads/master@{#373889}

TBR=twellington@chromium.org,donnd@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=551711

Committed: https://crrev.com/587347788a2e6a02b1a036ca49279fb3c6258b62
Cr-Commit-Position: refs/heads/master@{#373953}
==========

[commit-bot: I haz the power, 2016-02-05 23:52:27]

Patchset 1 (id:??) landed as
https://crrev.com/587347788a2e6a02b1a036ca49279fb3c6258b62
Cr-Commit-Position: refs/heads/master@{#373953}