Second try, first try at http://codereview.chromium.org/2803035 . Also contains http://codereview.chromium.org/2838044 , changes to DEPS files (mostly cleanups), and a change to webkit/glue/plugins/webplugin_delegate_impl_win.cc .

BUG= 48419
TEST=everything still builds

Review URL: http://codereview.chromium.org/2813047

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51692 0039d316-1c4b-4281-b951-d872f2087c98