Allow creating SharedBitmaps backed by new[]

Allow creating SharedBitmaps backed by new[]

Bitmaps allocated in the browser process may have to be shared between compositors (for surfaces) but not between processes, so they should be backed by new[] and use the SharedBitmap mechanism.

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=273743

[piman, 2014-05-29 21:51:34]

lgtm

[jbauman, 2014-05-29 21:52:22]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2014-05-29 21:55:35]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jbauman@chromium.org/307973004/1

[commit-bot: I haz the power, 2014-05-30 01:47:18]

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

[commit-bot: I haz the power, 2014-05-30 04:39:42]

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

[commit-bot: I haz the power, 2014-05-30 04:39:42]

Try jobs failed on following builders:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[jbauman, 2014-05-30 05:14:31]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2014-05-30 05:19:27]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jbauman@chromium.org/307973004/1

[commit-bot: I haz the power, 2014-05-30 07:02:29]

Change committed as 273743