[Line Layout API] Convert most of InlineBoxPainter to new API

Source/core/layout/api/LineLayoutItem.h

 // Copyright 2015 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 LineLayoutItem_h
 #define LineLayoutItem_h
 
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutObjectInlines.h"
 
 #include "platform/LayoutUnit.h"
 
 namespace blink {
 
 class ComputedStyle;
 class Document;
 class HitTestRequest;
 class HitTestLocation;
 class LayoutObject;
 class LineLayoutBox;
+class LineLayoutBoxModel;
 
 enum HitTestFilter;
 
 class LineLayoutItem {
 public:
     explicit LineLayoutItem(LayoutObject* layoutObject)
         : m_layoutObject(layoutObject)
     {
     }
 
@@ skipping 27 matching lines @@
     LineLayoutItem parent() const
     {
         return LineLayoutItem(m_layoutObject->parent());
     }
 
     // Implemented in LineLayoutBox.h
     // Intentionally returns a Box instead of a Block to avoid exposing LayoutBlock
     // to the line layout code.
     LineLayoutBox containingBlock() const;
 
+    // Implemented in LineLayoutBoxModel.h
+    // Intentionally returns a BoxModel to avoid exposing LayoutBoxModelObject

[leviw_travelin_and_unemployed, 2015/08/21 18:37:14]

Intentionally returns LineLayoutBoxModel

+    // to the line layout code.
+    LineLayoutBoxModel enclosingBoxModelObject() const;
+
     LineLayoutItem container() const
     {
         return LineLayoutItem(m_layoutObject->container());
     }
 
     bool isDescendantOf(const LineLayoutItem item) const
     {
         return m_layoutObject->isDescendantOf(item);
     }
 
@@ skipping 237 matching lines @@
     LayoutObject* layoutObject() { return m_layoutObject; }
     const LayoutObject* layoutObject() const { return m_layoutObject; }
 
 private:
     LayoutObject* m_layoutObject;
 };
 
 } // namespace blink
 
 #endif // LineLayoutItem_h