Support immersive fullscreen for non-video element

Support immersive fullscreen for non-video element

This change enables immersive mode for non-video element on kitkat+ devices.
The behavior is to match that of the video element when going into fullscreen.
downstream patch: https://chrome-internal-review.googlesource.com/#/c/210358/

BUG=378412
Committed: https://crrev.com/bb7e68651b6eb2e1f22e04265a50f4521a9350ad
Cr-Commit-Position: refs/heads/master@{#323339}

[qinmin, 2015-03-25 21:47:43]

Patchset #1 (id:1) has been deleted

[qinmin, 2015-03-25 21:51:52]

qinmin@chromium.org changed reviewers:
+ tedchoc@chromium.org

[qinmin, 2015-03-25 21:51:53]

PTAL

[Ted C, 2015-03-30 22:58:30]

lgtm

https://codereview.chromium.org/1031943006/diff/20001/chrome/android/java/src...
File
chrome/android/java/src/org/chromium/chrome/browser/fullscreen/FullscreenHtmlApiHandler.java
(right):

https://codereview.chromium.org/1031943006/diff/20001/chrome/android/java/src...
chrome/android/java/src/org/chromium/chrome/browser/fullscreen/FullscreenHtmlApiHandler.java:423:
* Helper method to return extra fullscreen UI flags for Kitkat devices.
for KitKat [and above] devices.

[qinmin, 2015-04-01 21:30:41]

The CQ bit was checked by qinmin@chromium.org

[commit-bot: I haz the power, 2015-04-01 21:31:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1031943006/20001

[commit-bot: I haz the power, 2015-04-01 22:19:41]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2015-04-01 22:21:25]

Patchset 1 (id:??) landed as
https://crrev.com/bb7e68651b6eb2e1f22e04265a50f4521a9350ad
Cr-Commit-Position: refs/heads/master@{#323339}