Remove some duplicate code / constants in pdf/.

Remove some duplicate code / constants in pdf/.

They were previously duplicated so the PDF module didn't have to depend
on code in printing/, but now the PDF module has been merged into the
main chrome binary.

Committed: https://crrev.com/16f763ce6608ade84839d6299a68070673fac9aa
Cr-Commit-Position: refs/heads/master@{#319225}

[Lei Zhang, 2015-03-05 01:20:35]

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

[jam, 2015-03-05 01:48:21]

lgtm

[Lei Zhang, 2015-03-05 02:19:49]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2015-03-05 02:20:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/980053002/1

[commit-bot: I haz the power, 2015-03-05 04:29:20]

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

[commit-bot: I haz the power, 2015-03-05 04:29:21]

Try jobs failed on following builders:
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Lei Zhang, 2015-03-05 05:02:54]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2015-03-05 05:03:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/980053002/1

[commit-bot: I haz the power, 2015-03-05 06:06:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-05 06:07:16]

Patchset 1 (id:??) landed as
https://crrev.com/16f763ce6608ade84839d6299a68070673fac9aa
Cr-Commit-Position: refs/heads/master@{#319225}