Fix paint and rect mapping issues for stacked float under stacked inline

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
index c4386dc28f16417b15beb3c673e7f263c47a8098..b934f67fad2d4e249adf6008a8c4ebc4511eb3d6 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
@@ -65,10 +65,11 @@ struct PaintPropertyTreeBuilderContext {
 
   ContainingBlockContext fixedPosition;
 
-  // This is the same as current.paintOffset except when a floating object has
-  // non-block ancestors under its containing block. Paint offsets of the
-  // non-block ancestors should not be accumulated for the floating object.
-  LayoutPoint paintOffsetForFloat;
+  // These are the same as current.paintOffset except when a floating object's
+  // parent is not a container. Paint offsets of the non-container ancestors
+  // should not be accumulated for the floating object.
+  LayoutPoint paintOffsetForNonStackedFloat;
+  LayoutPoint paintOffsetForStackedFloat;
 
   // The effect hierarchy is applied by the stacking context tree. It is
   // guaranteed that every DOM descendant is also a stacking context descendant.