Fix views Label and BookmarkButtonBase tooltip behavior.
Make BookmarkButtonBase handle tooltips, not child views.
(it will supersede its own Label and ImageView tooltips)
Only show height-overflow tooltips for multi-line Labels.
(single-line Labels only show tooltips for width overflow)
Add a LabelTest.TooltipProperty check for this case.
BUG=398333
TEST=Bookmark buttons show mutli-line title/url tooltips.
R=sky@chromium.org
Review URL: https://codereview.chromium.org/
414183005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@286839 0039d316-1c4b-4281-b951-d872f2087c98