Avoid duplicated code in LayoutBlockChild::layoutBlockChild().

Source/core/layout/LayoutBlockFlow.h

Index: Source/core/layout/LayoutBlockFlow.h
diff --git a/Source/core/layout/LayoutBlockFlow.h b/Source/core/layout/LayoutBlockFlow.h
index 4622eb7f1f888c253d0a23d5093df953eb4d4286..f249e016c22a25f108ef7d204374da3cbceb0237 100644
--- a/Source/core/layout/LayoutBlockFlow.h
+++ b/Source/core/layout/LayoutBlockFlow.h
@@ -288,6 +288,8 @@ private:
     bool layoutBlockFlow(bool relayoutChildren, LayoutUnit& pageLogicalHeight, SubtreeLayoutScope&);
     void layoutBlockChildren(bool relayoutChildren, SubtreeLayoutScope&, LayoutUnit beforeEdge, LayoutUnit afterEdge);
 
+    void markDescendantsWithFloatsForLayoutIfNeeded(LayoutBlockFlow& child, LayoutUnit newLogicalTop, LayoutUnit previousFloatLogicalBottom);
+    bool positionAndLayoutOnceIfNeeded(LayoutBox& child, LayoutUnit newLogicalTop, LayoutUnit& previousFloatLogicalBottom);
     void layoutBlockChild(LayoutBox& child, MarginInfo&, LayoutUnit& previousFloatLogicalBottom);
     void adjustPositionedBlock(LayoutBox& child, const MarginInfo&);
     void adjustFloatingBlock(const MarginInfo&);
@@ -487,7 +489,7 @@ private:
     LayoutUnit applyBeforeBreak(LayoutBox& child, LayoutUnit logicalOffset); // If the child has a before break, then return a new yPos that shifts to the top of the next page/column.
     LayoutUnit applyAfterBreak(LayoutBox& child, LayoutUnit logicalOffset, MarginInfo&); // If the child has an after break, then return a new offset that shifts to the top of the next page/column.
 
-    LayoutUnit adjustBlockChildForPagination(LayoutUnit logicalTopAfterClear, LayoutUnit estimateWithoutPagination, LayoutBox& child, bool atBeforeSideOfBlock);
+    LayoutUnit adjustBlockChildForPagination(LayoutUnit logicalTop, LayoutBox& child, bool atBeforeSideOfBlock);
     // Computes a deltaOffset value that put a line at the top of the next page if it doesn't fit on the current page.
     void adjustLinePositionForPagination(RootInlineBox&, LayoutUnit& deltaOffset);
     // If the child is unsplittable and can't fit on the current page, return the top of the next page/column.