Remove support for 'system' SSL on Mac (SecureTransport) and Win (SChannel)

net/base/cert_verify_proc_win.cc

Index: net/base/cert_verify_proc_win.cc
diff --git a/net/base/cert_verify_proc_win.cc b/net/base/cert_verify_proc_win.cc
index 390498cb170a8ebcfe0a19fe12de9ad0caa22157..d54e5157a27a5698aa1ebfd8c5f9bf9dbf537cc3 100644
--- a/net/base/cert_verify_proc_win.cc
+++ b/net/base/cert_verify_proc_win.cc
@@ -70,10 +70,6 @@ typedef scoped_ptr_malloc<const CERT_CONTEXT,
 
 //-----------------------------------------------------------------------------
 
-// TODO(wtc): This is a copy of the MapSecurityError function in
-// ssl_client_socket_win.cc.  Another function that maps Windows error codes
-// to our network error codes is WinInetUtil::OSErrorToNetError.  We should
-// eliminate the code duplication.
 int MapSecurityError(SECURITY_STATUS err) {
   // There are numerous security error codes, but these are the ones we thus
   // far find interesting.