[chromium] Remove unused debug border setters from the WebLayer API https://bugs.webkit.org/show_bug.cgi?id=102274 Reviewed by James Robinson. * chromium/public/WebLayer.h: (WebLayer): git-svn-id: https://svn.webkit.org/repository/webkit/trunk/Source/Platform/chromium/public@134833 268f45cc-cd09-0410-ab3c-d52691b4dbfc