Fix ctrl+shift+p for PDF

Fix ctrl+shift+p for PDF

Currentl we are intercepting ctrl+p on PDF to print, which is interfering
with ctrl+shift+p. There is no need to intercept either of these commands
anymore, the default handling should work correctly.

BUG=466600
Committed: https://crrev.com/78b9904963a16d99dbb40e30d9a3dac6b25e6285
Cr-Commit-Position: refs/heads/master@{#322328}

[raymes, 2015-03-26 04:34:48]

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

[Sam McNally, 2015-03-26 04:36:17]

lgtm

[raymes, 2015-03-26 04:37:22]

The CQ bit was checked by raymes@chromium.org

[commit-bot: I haz the power, 2015-03-26 04:38:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1031293004/1

[commit-bot: I haz the power, 2015-03-26 05:33:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-26 05:34:57]

Patchset 1 (id:??) landed as
https://crrev.com/78b9904963a16d99dbb40e30d9a3dac6b25e6285
Cr-Commit-Position: refs/heads/master@{#322328}