Refactor PDF ChunkStream and DocumentLoader code.

Refactor PDF ChunkStream and DocumentLoader code.

Add functions to make code more readable, and use more C++11.

Review-Url: https://codereview.chromium.org/2911853002
Cr-Commit-Position: refs/heads/master@{#475655}
Committed: https://chromium.googlesource.com/chromium/src/+/1d7b16f9b7854268e4a0ff8c94d5989fb84cd1ce

[Lei Zhang, 2017-05-28 07:23:03]

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

[commit-bot: I haz the power, 2017-05-28 07:23:11]

Dry run: 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, 2017-05-28 08:05:01]

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

[commit-bot: I haz the power, 2017-05-28 08:05:02]

Dry run: This issue passed the CQ dry run.

[Lei Zhang, 2017-05-30 18:42:44]

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

[dsinclair, 2017-05-30 18:50:27]

lgtm

[Lei Zhang, 2017-05-30 18:52:56]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2017-05-30 18:53:34]

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, 2017-05-30 20:25:37]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496170376767420, "parent_rev":
"656a1d16a3e4acabb8926505879dc426cf8fff62", "commit_rev":
"1d7b16f9b7854268e4a0ff8c94d5989fb84cd1ce"}

[commit-bot: I haz the power, 2017-05-30 20:25:47]

Description was changed from

==========
Refactor PDF ChunkStream and DocumentLoader code.

Add functions to make code more readable, and use more C++11.
==========

to

==========
Refactor PDF ChunkStream and DocumentLoader code.

Add functions to make code more readable, and use more C++11.

Review-Url: https://codereview.chromium.org/2911853002
Cr-Commit-Position: refs/heads/master@{#475655}
Committed:
https://chromium.googlesource.com/chromium/src/+/1d7b16f9b7854268e4a0ff8c94d5...
==========

[commit-bot: I haz the power, 2017-05-30 20:25:47]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/1d7b16f9b7854268e4a0ff8c94d5...