Upstream constant related functions

Upstream constant related functions

* Moves some functions that deal TabState filenames to TabState
  from TabPersistentStore downstream.

* Moves DOCUMENT_SCHEME from IntentHandler.java to UrlConstants.java
  with similar schemes.  Note that the DOCUMENT_SCHEME doesn't include
  the "://" string like the other Java scheme constants; this is because
  the Document classes use a real Uri parse to parse the scheme instead
  of doing a plain old TextUtils.equals() comparison.

BUG=415747
Committed: https://crrev.com/dad5c7e37ebf92ec62e4b940029d6a0236f44e5e
Cr-Commit-Position: refs/heads/master@{#308011}

[gone, 2014-12-11 23:04:33]

dfalcantara@chromium.org changed reviewers:
+ aurimas@chromium.org

[gone, 2014-12-11 23:07:29]

dfalcantara@chromium.org changed reviewers:
+ aurimas@chromium.org

[aurimas (slooooooooow), 2014-12-11 23:10:06]

aurimas@chromium.org changed reviewers:
+ aurimas@chromium.org

[aurimas (slooooooooow), 2014-12-11 23:10:06]

lgtm

[gone, 2014-12-11 23:10:19]

The CQ bit was checked by dfalcantara@chromium.org

[commit-bot: I haz the power, 2014-12-11 23:10:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/796113003/1

[gone, 2014-12-11 23:11:09]

dfalcantara@chromium.org changed reviewers:
+ dtrainor@chromium.org

[gone, 2014-12-11 23:11:09]

dtrainor@ for OWNERS.

[David Trainor- moved to gerrit, 2014-12-11 23:12:54]

lgtm

[commit-bot: I haz the power, 2014-12-12 00:38:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-12 00:39:24]

Patchset 1 (id:??) landed as
https://crrev.com/dad5c7e37ebf92ec62e4b940029d6a0236f44e5e
Cr-Commit-Position: refs/heads/master@{#308011}