Revert of [Contextual Search] Re-enabling tests.

Revert of [Contextual Search] Re-enabling tests. (patchset #1 id:1 of https://codereview.chromium.org/1410533005/ )

Reason for revert:
Failing test:

http://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/23204

Original issue's description:
> [Contextual Search] Re-enabling tests.
>
> I fixed the annotation to prevent some tests from running
> on tablets, which fixes failures we were seeing yesterday:
>
> https://codereview.chromium.org/1413003007
>
> Not sure exactly what happen, if my change didn't get
> rolled in time or what, but someone else ended up
> disabling those tests:
>
> https://codereview.chromium.org/1406963007
>
> So, now I'm re-enabling those tests. I'm also making sure to
> annotate all tests that call tapPeekingBarToExpandAndAssert()
> with RESTRICTION_TYPE_PHONE, because that assertion will
> always fail on tablets, given there's no expanded state in
> that case.
>
> BUG=551711
>
> Committed: https://crrev.com/4bde7aed3c12374a873705efbf0c974a0d68f197
> Cr-Commit-Position: refs/heads/master@{#358118}

TBR=donnd@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=551711
Committed: https://crrev.com/289430ff525096c91b7fa29633df19ded0f9c47e
Cr-Commit-Position: refs/heads/master@{#358152}

[pedro (no code reviews), 2015-11-05 22:35:18]

Created Revert of [Contextual Search] Re-enabling tests.

[commit-bot: I haz the power, 2015-11-05 22:36:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1415683012/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1415683012/1

[commit-bot: I haz the power, 2015-11-05 22:38:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-05 22:39:35]

Patchset 1 (id:??) landed as
https://crrev.com/289430ff525096c91b7fa29633df19ded0f9c47e
Cr-Commit-Position: refs/heads/master@{#358152}

[pedro (no code reviews), 2015-11-05 22:39:55]

For history sake, the offending test is this one:
org.chromium.chrome.browser.contextualsearch.ContextualSearchManagerTest#testChainedSearchLoadsCorrectSearchTerm
(CRASHED)

The test is crashing, so I couldn't find the stack trace.

Will update this change with more info, if I find something relevant.