Clean up forward declarations in Source/core/loader

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 19 matching lines @@
 
 #ifndef MixedContentChecker_h
 #define MixedContentChecker_h
 
 #include "public/platform/WebURLRequest.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class LocalFrame;
-class FrameLoaderClient;
 class KURL;
 class SecurityOrigin;
-class ResourceRequest;
 
 class MixedContentChecker {
     WTF_MAKE_NONCOPYABLE(MixedContentChecker);
 public:
     static bool shouldBlockFetch(LocalFrame*, WebURLRequest::RequestContext, WebURLRequest::FrameType, const KURL&);
     static bool shouldBlockWebSocket(LocalFrame*, const KURL&);
     static bool checkFormAction(LocalFrame*, const KURL&);
     static bool isMixedContent(SecurityOrigin*, const KURL&);
 
 private:
     enum ContextType {
         ContextTypeBlockable,
         ContextTypeOptionallyBlockable,
         ContextTypeShouldBeBlockable,
         ContextTypeBlockableUnlessLax
     };
 
     static LocalFrame* inWhichFrameIsThisContentMixed(LocalFrame*, WebURLRequest::RequestContext, WebURLRequest::FrameType, const KURL&);
     static ContextType contextTypeFromContext(WebURLRequest::RequestContext);
     static const char* typeNameFromContext(WebURLRequest::RequestContext);
     static void logToConsole(LocalFrame*, const KURL&, WebURLRequest::RequestContext, bool allowed);
 };
 
 } // namespace blink
 
 #endif // MixedContentChecker_h