Add missing header file for chrome_content_client.cc.

Add missing header file for chrome_content_client.cc.

chrome/common/chrome_content_client.cc uses base::WrapUnique but does
not include the header file "base/memory/ptr_util.h", this CL adds it
explicitly.

The implicit including will cause trybots failure just like what
happened in https://codereview.chromium.org/2063683002/#ps140001.

BUG=

Committed: https://crrev.com/ea5f432cad6e8887f8375af621ca6d02af1ae9bf
Cr-Commit-Position: refs/heads/master@{#401879}

[leonhsl(Using Gerrit), 2016-06-23 03:56:25]

The CQ bit was checked by leon.han@intel.com to run a CQ dry run

[commit-bot: I haz the power, 2016-06-23 03:56:43]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2095473003/1

[commit-bot: I haz the power, 2016-06-23 04:47:40]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-06-23 04:47:41]

Dry run: This issue passed the CQ dry run.

[leonhsl(Using Gerrit), 2016-06-23 05:05:38]

leon.han@intel.com changed reviewers:
+ jochen@chromium.org

[leonhsl(Using Gerrit), 2016-06-23 05:05:38]

Would you PTAL at this? Thanks~

[jochen (gone - plz use gerrit), 2016-06-24 13:36:30]

lgtm

[leonhsl(Using Gerrit), 2016-06-24 14:46:51]

The CQ bit was checked by leon.han@intel.com

[commit-bot: I haz the power, 2016-06-24 14:47:10]

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, 2016-06-24 15:45:23]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-06-24 15:45:24]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[leonhsl(Using Gerrit), 2016-06-24 16:04:21]

The CQ bit was checked by leon.han@intel.com

[commit-bot: I haz the power, 2016-06-24 16:04:55]

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, 2016-06-24 16:34:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-24 16:37:17]

Description was changed from

==========
Add missing header file for chrome_content_client.cc.

chrome/common/chrome_content_client.cc uses base::WrapUnique but does
not include the header file "base/memory/ptr_util.h", this CL adds it
explicitly.

The implicit including will cause trybots failure just like what
happened in https://codereview.chromium.org/2063683002/#ps140001.

BUG=
==========

to

==========
Add missing header file for chrome_content_client.cc.

chrome/common/chrome_content_client.cc uses base::WrapUnique but does
not include the header file "base/memory/ptr_util.h", this CL adds it
explicitly.

The implicit including will cause trybots failure just like what
happened in https://codereview.chromium.org/2063683002/#ps140001.

BUG=

Committed: https://crrev.com/ea5f432cad6e8887f8375af621ca6d02af1ae9bf
Cr-Commit-Position: refs/heads/master@{#401879}
==========

[commit-bot: I haz the power, 2016-06-24 16:37:18]

Patchset 1 (id:??) landed as
https://crrev.com/ea5f432cad6e8887f8375af621ca6d02af1ae9bf
Cr-Commit-Position: refs/heads/master@{#401879}