Remove CppBoundClass and webkit_renderer.gyp

BUG=297480
R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/131693002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244491 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244491