Allow FPDFBookmark_GetFirstChild to return the top level bookmark

Allow FPDFBookmark_GetFirstChild to return the top level bookmark

Previously when passing a NULL bookmark to FPDFBookmark_GetFirstChild it returned NULL instead of returning the top level bookmark. This change removes the early exit in this case allowing the top level bookmark to be retrieved.

BUG=https://code.google.com/p/pdfium/issues/detail?id=110
R=bo_xu@foxitsoftware.com, tsepez@chromium.org

Committed: https://pdfium.googlesource.com/pdfium/+/624b166d4f50874f93c6d0824e91cd5b955c0487

[Alexandre Carlton, 2015-01-15 02:05:37]

alexandrec@chromium.org changed reviewers:
+ bo_xu@foxitsoftware.com, tsepez@chromium.org

[Tom Sepez, 2015-01-15 17:20:55]

On 2015/01/15 02:05:37, Alexandre Carlton wrote:
> mailto:alexandrec@chromium.org changed reviewers:
> + mailto:bo_xu@foxitsoftware.com, mailto:tsepez@chromium.org

What issue does this fix?  Is there a corresponding bug in
https://code.google.com/p/pdfium/issues/list ?
(The code itself is fine).

[Bo Xu, 2015-01-15 17:46:40]

LGTM

[Alexandre Carlton, 2015-01-15 23:38:21]

On 2015/01/15 17:20:55, Tom Sepez wrote:
> On 2015/01/15 02:05:37, Alexandre Carlton wrote:
> > mailto:alexandrec@chromium.org changed reviewers:
> > + mailto:bo_xu@foxitsoftware.com, mailto:tsepez@chromium.org
> 
> What issue does this fix?  Is there a corresponding bug in
> https://code.google.com/p/pdfium/issues/list ?
> (The code itself is fine).

I have filed a bug (https://code.google.com/p/pdfium/issues/detail?id=110).

[Tom Sepez, 2015-01-15 23:40:28]

Thank you. LGTM.

[Alexandre Carlton, 2015-01-16 01:55:20]

The CQ bit was checked by alexandrec@chromium.org

[commit-bot: I haz the power, 2015-01-16 01:55:37]

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

[commit-bot: I haz the power, 2015-01-16 01:55:38]

Commit queue rejected this change because it did not recognize the base URL.
Please commit your change manually.

[raymes, 2015-01-16 02:11:34]

Is there special permission we need to be able to commit to this repo? We tried
commiting manually but it didn't seem to give us permission.

[Tom Sepez, 2015-01-16 02:13:41]

On 2015/01/16 01:55:38, I haz the power (commit-bot) wrote:
> Commit queue rejected this change because it did not recognize the base URL.
> Please commit your change manually.

There's no commit queue for pdfium yet :( --- I'm the manual version thereof.
I'll pull your patch and land it for you.

[Tom Sepez, 2015-01-16 02:14:50]

Committed patchset #1 (id:1) manually as
624b166d4f50874f93c6d0824e91cd5b955c0487 (presubmit successful).

[raymes, 2015-01-16 02:15:45]

Thanks Tom!!