PDF: Strip whitespace when determining whether a PDF's title is empty.

PDF: Strip whitespace when determining whether a PDF's title is empty.

Currently, if a PDF title contains only whitespace, that
whitespace-only title is displayed in the UI instead of the last path
component. With this change, a title containing only whitespace is
ignored just as an empty title is.

BUG=527309
Committed: https://crrev.com/8872f4fd0f5075bd7cce282a5f665fdd2efc2116
Cr-Commit-Position: refs/heads/master@{#348061}

[Sam McNally, 2015-09-08 07:24:39]

Patchset #1 (id:1) has been deleted

[Sam McNally, 2015-09-08 07:32:02]

sammc@chromium.org changed reviewers:
+ raymes@chromium.org

[raymes, 2015-09-09 04:25:53]

lgtm

Thanks for this!

[Sam McNally, 2015-09-10 00:01:38]

The CQ bit was checked by sammc@chromium.org

[commit-bot: I haz the power, 2015-09-10 00:02:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1316873006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1316873006/20001

[commit-bot: I haz the power, 2015-09-10 01:02:33]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2015-09-10 01:03:28]

Patchset 1 (id:??) landed as
https://crrev.com/8872f4fd0f5075bd7cce282a5f665fdd2efc2116
Cr-Commit-Position: refs/heads/master@{#348061}

[commit-bot: I haz the power, 2015-09-23 12:05:49]

Patchset 1 (id:??) landed as
https://crrev.com/8872f4fd0f5075bd7cce282a5f665fdd2efc2116
Cr-Commit-Position: refs/heads/master@{#348061}