Remove unused class WebNinePatchLayer.h.

Follow-up to https://codereview.chromium.org/1251413002/

BUG=

Review URL: https://codereview.chromium.org/1248413003

git-svn-id: svn://svn.chromium.org/blink/trunk@199410 bbb929c8-8fbe-4397-9dbb-9b2b20218538
4 files changed
tree: 602af9fdd1070abd668ca0cff01ff77b651a5156
  1. third_party/