Templatize PositionWithAffinity class

Source/core/layout/LayoutObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 13 matching lines @@
  */
 
 #ifndef LayoutObject_h
 #define LayoutObject_h
 
 #include "core/CoreExport.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentLifecycle.h"
 #include "core/dom/Element.h"
 #include "core/dom/Position.h"
+#include "core/editing/PositionWithAffinity.h"
 #include "core/editing/TextAffinity.h"
 #include "core/fetch/ImageResourceClient.h"
 #include "core/html/HTMLElement.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/layout/HitTestRequest.h"
 #include "core/layout/LayoutObjectChildList.h"
 #include "core/layout/PaintInvalidationState.h"
 #include "core/layout/ScrollAlignment.h"
 #include "core/layout/SubtreeLayoutScope.h"
 #include "core/layout/compositing/CompositingState.h"
 #include "core/layout/compositing/CompositingTriggers.h"
 #include "core/style/ComputedStyle.h"
 #include "core/style/StyleInheritedData.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/CompositingReasons.h"
 #include "platform/graphics/PaintInvalidationReason.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
 #include "platform/transforms/TransformationMatrix.h"
 
 namespace blink {
 
 class AffineTransform;
 class Cursor;
 class Document;
 class HitTestLocation;
 class HitTestResult;
 class InlineBox;
-class PositionWithAffinity;
 class PseudoStyleRequest;
 class LayoutBoxModelObject;
 class LayoutBlock;
 class LayoutFlowThread;
 class LayoutGeometryMap;
 class DeprecatedPaintLayer;
 class LayoutMultiColumnSpannerPlaceholder;
 class LayoutView;
 class TransformState;
 
@@ skipping 1585 matching lines @@
 void showTree(const blink::LayoutObject*);
 void showLineTree(const blink::LayoutObject*);
 void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 void showLayoutTree(const blink::LayoutObject* object1, const blink::LayoutObject* object2);
 
 #endif
 
 #endif // LayoutObject_h