Create org.chromium.content_public.common and move two classes there.

Create org.chromium.content_public.common and move two classes there.

ScreenOrientationValues and Referrer are being moved there. Another
class regarding shortcuts and default orientaiton will also be added.

BUG=366145
TBR=avi@chromium.org (for content/content.gyp)

Committed: https://crrev.com/c806854f11967371b4f2fd87b91a3706077776b1
Cr-Commit-Position: refs/heads/master@{#295473}

[mlamouri (slow - plz ping), 2014-09-18 13:23:30]

mlamouri@chromium.org changed reviewers:
+ bauerb@chromium.org

[Bernhard Bauer, 2014-09-18 13:34:01]

lgtm

[mlamouri (slow - plz ping), 2014-09-18 13:36:21]

mlamouri@chromium.org changed reviewers:
+ benm@chromium.org

[mlamouri (slow - plz ping), 2014-09-18 13:36:22]

+benm@ for OWNER review.

[benm (inactive), 2014-09-18 14:06:23]

lgtm

[mlamouri (slow - plz ping), 2014-09-18 14:07:56]

The CQ bit was checked by mlamouri@chromium.org

[commit-bot: I haz the power, 2014-09-18 14:08:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/584523003/1

[commit-bot: I haz the power, 2014-09-18 15:58:44]

Committed patchset #1 (id:1) as f860f19c10c21159565868c85ae63105d3a0f2ab

[commit-bot: I haz the power, 2014-09-18 15:59:30]

Patchset 1 (id:??) landed as
https://crrev.com/c806854f11967371b4f2fd87b91a3706077776b1
Cr-Commit-Position: refs/heads/master@{#295473}