[Line Layout API] Add needsLayout() to LineLayoutItem

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"
 
@@ skipping 22 matching lines @@
     {
     }
 
     LineLayoutItem() : m_layoutObject(0) { }
 
     // TODO(pilgrim): Remove this. It's only here to make things compile before
     // switching all of core/layout/line to using the API.
     // https://crbug.com/499321
     operator LayoutObject*() const { return m_layoutObject; }
 
+    bool needsLayout() const
+    {
+        return m_layoutObject->needsLayout();
+    }
+
     Node* node() const
     {
         return m_layoutObject->node();
     }
 
     Node* nonPseudoNode() const
     {
         return m_layoutObject->nonPseudoNode();
     }
 
@@ skipping 257 matching lines @@
     LayoutObject* layoutObject() { return m_layoutObject; }
     const LayoutObject* layoutObject() const { return m_layoutObject; }
 
 private:
     LayoutObject* m_layoutObject;
 };
 
 } // namespace blink
 
 #endif // LineLayoutItem_h