Add prefs for collapsed currently open tabs group in new tab page

Add prefs for collapsed currently open tabs group in new tab page

BUG=389697
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284309

[David Trainor- moved to gerrit, 2014-07-18 16:52:28]

lgtm

style/general code lgtm.  not sure what this is for though!

[newt (away), 2014-07-18 18:41:13]

lgtm

https://codereview.chromium.org/405623003/diff/1/chrome/android/java/src/org/...
File chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java
(right):

https://codereview.chromium.org/405623003/diff/1/chrome/android/java/src/org/...
chrome/android/java/src/org/chromium/chrome/browser/NewTabPagePrefs.java:34: *
Set currently open tabs list collapsed or uncollapsed state in preferences.
these javadocs are pretty heinous, but at least they're all consistent :P

(I like this better:

"[Sets|Gets] whether the list of currently open tabs is collapsed (vs expanded)
on the Recent Tabs page."

and 

"@return Whether the list of currently open tabs is collapsed (vs expanded) on
the Recent Tabs page."

and all instances of "{@code True}" should be removed... those are all
copied-pasta'd typos)

[Yusuf, 2014-07-18 22:54:37]

The CQ bit was checked by yusufo@chromium.org

[commit-bot: I haz the power, 2014-07-18 22:56:50]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yusufo@chromium.org/405623003/20001

[commit-bot: I haz the power, 2014-07-19 04:50:00]

Change committed as 284309