Fix compilation after r105165.

Source/WebCore/rendering/RenderFlexibleBox.cpp

Index: Source/WebCore/rendering/RenderFlexibleBox.cpp
===================================================================
--- Source/WebCore/rendering/RenderFlexibleBox.cpp	(revision 105192)
+++ Source/WebCore/rendering/RenderFlexibleBox.cpp	(working copy)
@@ -579,7 +579,7 @@
     child->containingBlock()->insertPositionedObject(child);
     RenderLayer* childLayer = child->layer();
     LayoutUnit inlinePosition = isColumnFlow() ? crossAxisOffset : mainAxisOffset;
-    if (style()->flexDirection() == FlowRowReverse)
+    if (style()->flexFlow() == FlowRowReverse)
         inlinePosition = mainAxisExtent() - mainAxisOffset;
     childLayer->setStaticInlinePosition(inlinePosition); // FIXME: Not right for regions.
 
@@ -608,8 +608,9 @@
     size_t i = 0;
     for (RenderBox* child = iterator.first(); child; child = iterator.next(), ++i) {
         if (child->isPositioned()) {
-            prepareChildForPositionedLayout(child, mainAxisOffset, crossAxisOffset);
-            mainAxisOffset += packingSpaceBetweenChildren(availableFreeSpace, totalPositiveFlexibility, style()->flexPack(), childSizes.size());
+            prepareChildForPositionedLayout(child, startEdge, logicalTop);
+            if (hasPackingSpace(availableFreeSpace, totalPositiveFlexibility) && style()->flexPack() == PackJustify && childSizes.size() > 1)
+                startEdge += availableFreeSpace / (childSizes.size() - 1);
             continue;
         }
         LayoutUnit childPreferredSize = childSizes[i] + mainAxisBorderAndPaddingExtentForChild(child);