blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/paint/BoxPaintInvalidator.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 BoxPaintInvalidator_h
 #define BoxPaintInvalidator_h
 
 #include "platform/graphics/PaintInvalidationReason.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class LayoutBox;
-class LayoutRect;
 class LayoutSize;
 struct PaintInvalidatorContext;
 
 class BoxPaintInvalidator {
   STACK_ALLOCATED();
 
  public:
   BoxPaintInvalidator(const LayoutBox& box,
                       const PaintInvalidatorContext& context)
       : m_box(box), m_context(context) {}
@@ skipping 11 matching lines @@
   void savePreviousBoxSizesIfNeeded();
   LayoutSize computePreviousBorderBoxSize(const LayoutSize& previousBoundsSize);
 
   const LayoutBox& m_box;
   const PaintInvalidatorContext& m_context;
 };
 
 }  // namespace blink
 
 #endif