Remove unused imports

Remove unused imports

BUG=367677
R=danakj@chromium.org,tfarina@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=269611

[Andrew Hayden (chromium.org), 2014-04-28 14:46:49]

PTAL, should be a no-op. Doesn't appear to affect anyone's transitive include
path.

[tfarina, 2014-05-09 02:42:13]

Dana? Can you rubber stamp this?

Andrew, this looks fine to me, but I'm not an OWNER so I can't approve this
myself for you. I can just give you my informal approval.

Thanks for cleaning this up.

[danakj, 2014-05-09 17:09:57]

LGTM

[tfarina, 2014-05-09 17:12:52]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-05-09 17:16:03]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/andrewhayden@chromium.org/253723006/1

[commit-bot: I haz the power, 2014-05-09 18:16:56]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  linux_chromium_chromeos_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)

[commit-bot: I haz the power, 2014-05-10 19:02:41]

Change committed as 269611

[Andrew Hayden (chromium.org), 2014-05-12 11:56:12]

Thanks for the reviews and the commit box.