Apply OwnPtr|PassOwnPtr to m_validationMessageClient and setValidationMessageClient() in Page class

Apply OwnPtr|PassOwnPtr to m_validationMessageClient and arguments of setValidationMessageClient() in Page class

In WebViewImpl, m_validationMessage is only used for passing a pointer of ValidationMessageClient. To remove it, we need to apply OwnPtr|PassOwnPtr to m_validationMessageClient and an argument of setValidationMessageClient() in Page class.

Additionally this cl makes to return a reference instead of a pointer of m_validationMessageClient in validationMessageClient() of Page class.

BUG=N/A

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=171004

[gyuyoung-inactive, 2014-04-04 19:07:53]

Add jochen to reviewer.

[jochen (gone - plz use gerrit), 2014-04-07 13:01:01]

lgtm

[gyuyoung-inactive, 2014-04-07 15:35:43]

The CQ bit was checked by gyuyoung.kim@samsung.com

[commit-bot: I haz the power, 2014-04-07 15:35:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/gyuyoung.kim@samsung.com/225393002/40001

[commit-bot: I haz the power, 2014-04-07 16:35:10]

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

[commit-bot: I haz the power, 2014-04-07 16:35:11]

Try jobs failed on following builders:
  tryserver.blink on win_blink_rel

[gyuyoung-inactive, 2014-04-07 23:00:18]

The CQ bit was checked by gyuyoung.kim@samsung.com

[commit-bot: I haz the power, 2014-04-07 23:00:28]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/gyuyoung.kim@samsung.com/225393002/40001

[commit-bot: I haz the power, 2014-04-07 23:37:34]

Change committed as 171004