blink: Cleanup class/struct forward declarations

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ShapeResultBuffer_h
 #define ShapeResultBuffer_h
 
 #include "platform/fonts/shaping/ShapeResult.h"
 #include "wtf/Allocator.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 struct CharacterRange;
 class GlyphBuffer;
+struct GlyphData;
 class TextRun;
 
 class ShapeResultBuffer {
   WTF_MAKE_NONCOPYABLE(ShapeResultBuffer);
   STACK_ALLOCATED();
 
  public:
   ShapeResultBuffer() : m_hasVerticalOffsets(false) {}
 
   void appendResult(PassRefPtr<const ShapeResult> result) {
@@ skipping 47 matching lines @@
 
   // Empirically, cases where we get more than 50 ShapeResults are extremely
   // rare.
   Vector<RefPtr<const ShapeResult>, 64> m_results;
   bool m_hasVerticalOffsets;
 };
 
 }  // namespace blink
 
 #endif  // ShapeResultBuffer_h