Utility process: initialize GTK when the sandbox is disabled.

BUG=309093
TEST=Open the Web Store, utility process launches correctly.

Review URL: https://codereview.chromium.org/34123003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230287 0039d316-1c4b-4281-b951-d872f2087c98
[ash] Store ShelfLayoutManger in ShelfView instead of fetching it from ShelfTooltipManager

When ShelfView needs ShelfLayoutManager, it always fetched it from ShelfTooltipManager.
I think storing it in ShelfView is more better.

R=jamescook@chromium.org
BUG=NONE

Review URL: https://codereview.chromium.org/34373004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230288 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230288