Split positionAndLayoutFloat() off positionNewFloats().

third_party/WebKit/Source/core/layout/LayoutBlockFlow.h

Index: third_party/WebKit/Source/core/layout/LayoutBlockFlow.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.h b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.h
index 15b30a0a7aefe397edf9db6c10968aee625de09b..50f77353f0c4fcdc7eca3c3d38ce4bf10f7b8345 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.h
@@ -352,6 +352,11 @@ class CORE_EXPORT LayoutBlockFlow : public LayoutBlock {
   // Returns true if and only if it has positioned any floats.
   bool positionNewFloats(LineWidth* = nullptr);
 
+  // Position and lay out the float, if it needs layout.
+  // |logicalTop| is the minimum logical top offset for the float (margin edge).
+  // The value returned is the minimum logical top offset for subsequent floats.
+  LayoutUnit positionAndLayoutFloat(FloatingObject&, LayoutUnit logicalTop);
+
   LayoutUnit nextFloatLogicalBottomBelow(LayoutUnit) const;
   LayoutUnit nextFloatLogicalBottomBelowForBlock(LayoutUnit) const;