blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/css/FontFaceSet.h

 /*
  * Copyright (C) 2013 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
 
 // Mac OS X 10.6 SDK defines check() macro that interferes with our check()
 // method
 #ifdef check
 #undef check
 #endif
 
 namespace blink {
 
 class CSSFontFace;
-class CSSFontFaceSource;
 class CSSFontSelector;
-class Dictionary;
 class ExceptionState;
 class Font;
 class FontFaceCache;
-class FontResource;
 class ExecutionContext;
 
 using FontFaceSetIterable = PairIterable<Member<FontFace>, Member<FontFace>>;
 
 class FontFaceSet final : public EventTargetWithInlineData,
                           public Supplement<Document>,
                           public ActiveDOMObject,
                           public FontFaceSetIterable,
                           public FontFace::LoadFontCallback {
   USING_GARBAGE_COLLECTED_MIXIN(FontFaceSet);
@@ skipping 119 matching lines @@
   HeapListHashSet<Member<FontFace>> m_nonCSSConnectedFaces;
 
   Member<AsyncMethodRunner<FontFaceSet>> m_asyncRunner;
 
   FontLoadHistogram m_histogram;
 };
 
 }  // namespace blink
 
 #endif  // FontFaceSet_h