Remove unnecessary Border subclasses where we can achieve the same functionality
without subclassing.

BUG=none
TEST=none
R=sky@chromium.org

Review URL: https://codereview.chromium.org/81833007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236844 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236844
Blink roll 162549:162559

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=162550:162559&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/82713006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236845 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236845
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236846 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236846