Implement incremental paint property tree rebuilding

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 1bec1d9bf4cfd2242012e8d61cf061a423b10aab..0f53b2a02f306948b1d802a6ba3329ce84a7eb3e 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
@@ -83,11 +83,14 @@ struct PaintPropertyTreeBuilderContext {
 class PaintPropertyTreeBuilder {
  public:
   PaintPropertyTreeBuilderContext setupInitialContext();
-  void buildTreeNodes(FrameView&, PaintPropertyTreeBuilderContext&);
-  void buildTreeNodesForSelf(const LayoutObject&,
-                             PaintPropertyTreeBuilderContext&);
-  void buildTreeNodesForChildren(const LayoutObject&,
-                                 PaintPropertyTreeBuilderContext&);
+  // TODO(pdr): Document this before landing.
+  void updateProperties(FrameView&, PaintPropertyTreeBuilderContext&);
+
+  // TODO(pdr): Document this before landing.
+  void updatePropertiesForSelf(const LayoutObject&,
+                               PaintPropertyTreeBuilderContext&);
+  void updatePropertiesForChildren(const LayoutObject&,
+                                   PaintPropertyTreeBuilderContext&);
 
  private:
   static void updatePaintOffsetTranslation(const LayoutObject&,