Mixed Content: Add use counters for content types.

Source/core/loader/MixedContentChecker.h

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 70 matching lines @@
     enum ContextType {
         ContextTypeBlockable,
         ContextTypeOptionallyBlockable,
         ContextTypeShouldBeBlockable,
         ContextTypeBlockableUnlessLax
     };
 
     static ContextType contextTypeFromContext(WebURLRequest::RequestContext);
     static const char* typeNameFromContext(WebURLRequest::RequestContext);
     static void logToConsole(LocalFrame*, const KURL&, WebURLRequest::RequestContext, bool allowed);
+    static void count(LocalFrame*, WebURLRequest::RequestContext);
 
     // FIXME: This should probably have a separate client from FrameLoader.
     FrameLoaderClient* client() const;
 
     bool canDisplayInsecureContentInternal(SecurityOrigin*, const KURL&, const MixedContentType) const;
 
     bool canRunInsecureContentInternal(SecurityOrigin*, const KURL&, const MixedContentType) const;
 
     void logWarning(bool allowed, const KURL& i, const MixedContentType) const;
 
     RawPtrWillBeMember<LocalFrame> m_frame;
 };
 
 } // namespace blink
 
 #endif // MixedContentChecker_h