blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/page/scrolling/SnapCoordinator.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 SnapCoordinator_h
 #define SnapCoordinator_h
 
 #include "core/CoreExport.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
-class ComputedStyle;
 class ContainerNode;
-class Element;
 class LayoutBox;
 struct LengthPoint;
 
 // Snap Coordinator keeps track of snap containers and all of their associated
 // snap areas. It also contains the logic to generate the list of valid snap
 // positions for a given snap container.
 //
 // Snap container:
 //   An scroll container that has 'scroll-snap-type' value other
 //   than 'none'.
@@ skipping 26 matching lines @@
   explicit SnapCoordinator();
 
   Vector<double> snapOffsets(const ContainerNode&, ScrollbarOrientation);
 
   HashSet<const LayoutBox*> m_snapContainers;
 };
 
 }  // namespace blink
 
 #endif  // SnapCoordinator_h