Have MixedContentChecker and ProgressTracker keep a LocalFrame Member.

Source/core/loader/MixedContentChecker.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 389 matching lines @@
     KURL documentIP(ParsedURLString, "http://" + frame->document()->loader()->response().remoteIPAddress());
     KURL resourceIP(ParsedURLString, "http://" + resourceIPAddress);
 
     // Just count these for the moment, don't block them.
     //
     // FIXME: Once we know how we want to check this, adjust the platform APIs to avoid the KURL construction.
     if (Platform::current()->isReservedIPAddress(resourceIP) && !Platform::current()->isReservedIPAddress(documentIP))
         UseCounter::count(frame->document(), UseCounter::MixedContentPrivateHostnameInPublicHostname);
 }
 
+void MixedContentChecker::trace(Visitor* visitor)
+{
+    visitor->trace(m_frame);
+}
+
 } // namespace blink