Added a method to check if adding a shortcut to the homescreen is supported.

Added a method to check if adding a shortcut to the homescreen is supported.

The method usage is added here: https://chrome-internal-review.googlesource.com/172629

BUG=403891
NOTRY=true
NOTREECHECKS=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=290003

[whywhat, 2014-08-15 15:52:16]

PTaL

[gone, 2014-08-15 18:00:29]

lgtm

[whywhat, 2014-08-15 18:15:50]

+Ted for OWNERS LGTM :)

[Ted C, 2014-08-15 18:19:54]

lgtm

[whywhat, 2014-08-15 18:20:44]

The CQ bit was checked by avayvod@chromium.org

[commit-bot: I haz the power, 2014-08-15 18:23:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/avayvod@chromium.org/479573002/1

[commit-bot: I haz the power, 2014-08-15 19:57:21]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_chromium_gn_compile_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)

[commit-bot: I haz the power, 2014-08-15 20:21:38]

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

[commit-bot: I haz the power, 2014-08-15 20:21:38]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)

[whywhat, 2014-08-15 20:28:25]

The CQ bit was checked by avayvod@chromium.org

[commit-bot: I haz the power, 2014-08-15 20:31:31]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/avayvod@chromium.org/479573002/1

[commit-bot: I haz the power, 2014-08-15 20:35:28]

Committed patchset #1 (1) as 290003