Get rid of the extra vector when setting up the orderIterator.

Source/core/rendering/RenderFlexibleBox.h

Index: Source/core/rendering/RenderFlexibleBox.h
diff --git a/Source/core/rendering/RenderFlexibleBox.h b/Source/core/rendering/RenderFlexibleBox.h
index 828aef5962aacc719e1f51637c18e085c3e9e95e..b5cd5a78192f73ced82e06ab2c67a68417c6dd01 100644
--- a/Source/core/rendering/RenderFlexibleBox.h
+++ b/Source/core/rendering/RenderFlexibleBox.h
@@ -84,10 +84,11 @@ private:
         RenderBox* next();
         void reset();
 
+        Vector<int> m_orderValues;
+
     private:
         const RenderFlexibleBox* m_flexibleBox;
         RenderBox* m_currentChild;
-        Vector<int> m_orderValues;
         Vector<int>::const_iterator m_orderValuesIterator;
     };
 
@@ -151,7 +152,7 @@ private:
     LayoutUnit marginBoxAscentForChild(RenderBox*);
 
     LayoutUnit computeChildMarginValue(Length margin, RenderView*);
-    void computeMainAxisPreferredSizes(Vector<int>&);
+    void prepareOrderIteratorAndMargins();
     LayoutUnit adjustChildSizeForMinAndMax(RenderBox*, LayoutUnit childSize);
     bool computeNextFlexLine(OrderedFlexItemList& orderedChildren, LayoutUnit& preferredMainAxisExtent, double& totalFlexGrow, double& totalWeightedFlexShrink, LayoutUnit& minMaxAppliedMainAxisExtent, bool& hasInfiniteLineLength);