Avoid crash during PaintController::showDebugData()

Avoid crash during PaintController::showDebugData()

During merging, display items that have been moved to new places
have null client. Avoid crash during PaintController::showDebugData()
so that we can dump data during merge.

Committed: https://crrev.com/bb7a91b5029ba5d3281b6aa272af89cebacd5320
Cr-Commit-Position: refs/heads/master@{#383880}

[Xianzhu, 2016-03-29 23:00:23]

wangxianzhu@chromium.org changed reviewers:
+ pdr@chromium.org

[pdr., 2016-03-29 23:12:05]

On 2016/03/29 at 23:00:24, wangxianzhu wrote:
> 

Now you're just showin' off :)

LGTM

[pdr., 2016-03-29 23:12:09]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2016-03-29 23:12:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1843863002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1843863002/1

[commit-bot: I haz the power, 2016-03-30 00:55:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-30 00:56:34]

Description was changed from

==========
Avoid crash during PaintController::showDebugData()

During merging, display items that have been moved to new places
have null client. Avoid crash during PaintController::showDebugData()
so that we can dump data during merge.
==========

to

==========
Avoid crash during PaintController::showDebugData()

During merging, display items that have been moved to new places
have null client. Avoid crash during PaintController::showDebugData()
so that we can dump data during merge.

Committed: https://crrev.com/bb7a91b5029ba5d3281b6aa272af89cebacd5320
Cr-Commit-Position: refs/heads/master@{#383880}
==========

[commit-bot: I haz the power, 2016-03-30 00:56:36]

Patchset 1 (id:??) landed as
https://crrev.com/bb7a91b5029ba5d3281b6aa272af89cebacd5320
Cr-Commit-Position: refs/heads/master@{#383880}