blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/platform/fonts/shaping/ShapeCache.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2015 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 20 matching lines @@
 #include "platform/text/TextRun.h"
 #include "wtf/Forward.h"
 #include "wtf/HashFunctions.h"
 #include "wtf/HashSet.h"
 #include "wtf/HashTableDeletedValueType.h"
 #include "wtf/StringHasher.h"
 #include "wtf/WeakPtr.h"
 
 namespace blink {
 
-class Font;
-
 struct ShapeCacheEntry {
   DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
   ShapeCacheEntry() { m_shapeResult = nullptr; }
   RefPtr<const ShapeResult> m_shapeResult;
 };
 
 class ShapeCache {
   USING_FAST_MALLOC(ShapeCache);
   WTF_MAKE_NONCOPYABLE(ShapeCache);
 
@@ skipping 196 matching lines @@
 inline bool operator==(const ShapeCache::SmallStringKey& a,
                        const ShapeCache::SmallStringKey& b) {
   if (a.length() != b.length() || a.direction() != b.direction())
     return false;
   return WTF::equal(a.characters(), b.characters(), a.length());
 }
 
 }  // namespace blink
 
 #endif  // ShapeCache_h