Fix a double free in CPDFSDK_PageView::IsValidAnnot().

Fix a double free in CPDFSDK_PageView::IsValidAnnot().

BUG=635848
Committed: https://pdfium.googlesource.com/pdfium/+/4674d957a7637da9d242ff1bdba73a078f99a171

[Lei Zhang, 2016-08-16 20:51:38]

The CQ bit was checked by thestig@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-16 20:51:40]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Lei Zhang, 2016-08-16 20:54:31]

thestig@chromium.org changed reviewers:
+ weili@chromium.org

[Lei Zhang, 2016-08-16 20:54:31]

We can't create a unique_ptr to pass into ContainsValue(), because the
unique_ptr will eventually get destroyed and in turn delete its pointer.

[commit-bot: I haz the power, 2016-08-16 21:13:00]

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

[commit-bot: I haz the power, 2016-08-16 21:13:01]

Dry run: This issue passed the CQ dry run.

[Wei Li, 2016-08-16 23:53:39]

lgtm, thanks

[Lei Zhang, 2016-08-17 00:02:30]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2016-08-17 00:02:34]

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, 2016-08-17 00:02:51]

Description was changed from

==========
Fix a double free in CPDFSDK_PageView::IsValidAnnot().

BUG=635848
==========

to

==========
Fix a double free in CPDFSDK_PageView::IsValidAnnot().

BUG=635848

Committed:
https://pdfium.googlesource.com/pdfium/+/4674d957a7637da9d242ff1bdba73a078f99...
==========

[commit-bot: I haz the power, 2016-08-17 00:02:52]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/4674d957a7637da9d242ff1bdba73a078f99...