Renaming: distinguish ancestor, container and paintInvalidationContainer

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

Index: third_party/WebKit/Source/core/layout/LayoutGeometryMap.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutGeometryMap.h b/third_party/WebKit/Source/core/layout/LayoutGeometryMap.h
index 4fe2cc5fe8db044da2ed36ab49a00b3e62966471..78436b0d4d8bebb0684b2affb8f7b255259c6972 100644
--- a/third_party/WebKit/Source/core/layout/LayoutGeometryMap.h
+++ b/third_party/WebKit/Source/core/layout/LayoutGeometryMap.h
@@ -55,13 +55,13 @@ public:
 
     FloatRect absoluteRect(const FloatRect& rect) const
     {
-        return mapToContainer(rect, 0).boundingBox();
+        return mapToAncestor(rect, 0).boundingBox();
     }
 
-    // Map to a container. Will assert that the container has been pushed onto this map.
-    // A null container maps through the LayoutView (including its scale transform, if any).
-    // If the container is the LayoutView, the scroll offset is applied, but not the scale.
-    FloatQuad mapToContainer(const FloatRect&, const LayoutBoxModelObject*) const;
+    // Map to an ancestor. Will assert that the ancestor has been pushed onto this map.
+    // A null ancestor maps through the LayoutView (including its scale transform, if any).
+    // If the ancestor is the LayoutView, the scroll offset is applied, but not the scale.
+    FloatQuad mapToAncestor(const FloatRect&, const LayoutBoxModelObject*) const;
 
     // Called by code walking the layout or layer trees.
     void pushMappingsToAncestor(const PaintLayer*, const PaintLayer* ancestorLayer);
@@ -77,7 +77,7 @@ public:
 
 private:
     void popMappingsToAncestor(const LayoutBoxModelObject*);
-    void mapToContainer(TransformState&, const LayoutBoxModelObject* container = nullptr) const;
+    void mapToAncestor(TransformState&, const LayoutBoxModelObject* ancestor = nullptr) const;
 
     void stepInserted(const LayoutGeometryMapStep&);
     void stepRemoved(const LayoutGeometryMapStep&);