Another round of PDF plugin cleanups.

Another round of PDF plugin cleanups.

- Use for-range loops / std::vector::insert() when possible.
- Mark methods const.
- Use std::{string,vector}::empty() instead of size() when possible.

Committed: https://crrev.com/ccb5fc8ff322c02db30604d0df003626eaff5f34
Cr-Commit-Position: refs/heads/master@{#367486}

[Lei Zhang, 2016-01-05 00:42:31]

Description was changed from

==========
Another round of PDF plugin cleanups.

Use for-range loops when possible.
==========

to

==========
Another round of PDF plugin cleanups.

- Use for-range loops / std::vector::insert() when possible.
- Mark methods const.
- Use std::{string,vector}::empty() instead of size() when possible.
==========

[Lei Zhang, 2016-01-05 00:42:32]

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

[Lei Zhang, 2016-01-05 00:43:59]

Hopefully the last round for a while.

[raymes, 2016-01-05 04:18:12]

lgtm

[Lei Zhang, 2016-01-05 05:27:01]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2016-01-05 05:27:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1555153003/30001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1555153003/30001

[commit-bot: I haz the power, 2016-01-05 05:33:00]

Description was changed from

==========
Another round of PDF plugin cleanups.

- Use for-range loops / std::vector::insert() when possible.
- Mark methods const.
- Use std::{string,vector}::empty() instead of size() when possible.
==========

to

==========
Another round of PDF plugin cleanups.

- Use for-range loops / std::vector::insert() when possible.
- Mark methods const.
- Use std::{string,vector}::empty() instead of size() when possible.
==========

[commit-bot: I haz the power, 2016-01-05 05:33:01]

Committed patchset #3 (id:30001)

[commit-bot: I haz the power, 2016-01-05 05:33:53]

Description was changed from

==========
Another round of PDF plugin cleanups.

- Use for-range loops / std::vector::insert() when possible.
- Mark methods const.
- Use std::{string,vector}::empty() instead of size() when possible.
==========

to

==========
Another round of PDF plugin cleanups.

- Use for-range loops / std::vector::insert() when possible.
- Mark methods const.
- Use std::{string,vector}::empty() instead of size() when possible.

Committed: https://crrev.com/ccb5fc8ff322c02db30604d0df003626eaff5f34
Cr-Commit-Position: refs/heads/master@{#367486}
==========

[commit-bot: I haz the power, 2016-01-05 05:33:54]

Patchset 3 (id:??) landed as
https://crrev.com/ccb5fc8ff322c02db30604d0df003626eaff5f34
Cr-Commit-Position: refs/heads/master@{#367486}