Set document posting "cp-dialog-set-print-document" message

Set document posting "cp-dialog-set-print-document" message.

This code needs inject document into webpage.
Old implementation executed JS directly. That was disabled
as insecure.
Now we will post a message and web page will handle them.
Server already listens message "cp-dialog-set-print-document: {...}".

BUG=542821
Committed: https://crrev.com/45494de6b97a67849e80c6b4ab582ae1d86eac4c
Cr-Commit-Position: refs/heads/master@{#354923}

[Vitaly Buka (NO REVIEWS), 2015-10-19 23:07:19]

vitalybuka@chromium.org changed reviewers:
+ alekseys@chromium.org, dbeam@chromium.org

[Vitaly Buka (NO REVIEWS), 2015-10-19 23:07:28]

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

[Vitaly Buka (NO REVIEWS), 2015-10-19 23:07:45]

vitalybuka@chromium.org changed reviewers:
+ jochen@chromium.org

[commit-bot: I haz the power, 2015-10-19 23:08:03]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1420433003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1420433003/1

[Vitaly Buka (NO REVIEWS), 2015-10-19 23:08:31]

Description was changed from

==========
Set document using using "cp-dialog-set-print-document" message

BUG=542821
==========

to

==========
Set document posting "cp-dialog-set-print-document" message.

BUG=542821
==========

[commit-bot: I haz the power, 2015-10-19 23:11:52]

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

[commit-bot: I haz the power, 2015-10-19 23:11:52]

Dry run: Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_gn_rel on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_gn_r...)

[Dan Beam, 2015-10-19 23:12:50]

lgtm (but I think your CL description could be clearer)

[Vitaly Buka (NO REVIEWS), 2015-10-19 23:29:27]

Description was changed from

==========
Set document posting "cp-dialog-set-print-document" message.

BUG=542821
==========

to

==========
Set document posting "cp-dialog-set-print-document" message.

This code needs inject document into webpage.
Old implementation executed JS directly. That was disabled
as insecure.
Now we will post a message and web page will handle them.
Server already listens message "cp-dialog-set-print-document: {...}".

BUG=542821
==========

[Vitaly Buka (NO REVIEWS), 2015-10-19 23:39:37]

The CQ bit was checked by vitalybuka@chromium.org

[Vitaly Buka (NO REVIEWS), 2015-10-19 23:39:37]

The patchset sent to the CQ was uploaded after l-g-t-m from dbeam@chromium.org
Link to the patchset: https://codereview.chromium.org/1420433003/#ps20001
(title: " ")

[commit-bot: I haz the power, 2015-10-19 23:40:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1420433003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1420433003/20001

[commit-bot: I haz the power, 2015-10-20 00:11:38]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-10-20 00:12:23]

Patchset 2 (id:??) landed as
https://crrev.com/45494de6b97a67849e80c6b4ab582ae1d86eac4c
Cr-Commit-Position: refs/heads/master@{#354923}

[jochen (gone - plz use gerrit), 2015-10-20 07:41:23]

lgtm

[Aleksey Shlyapnikov, 2015-10-20 17:42:56]

lgtm