Implement incremental paint property tree rebuilding

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PaintPropertyTreeBuilder_h
 #define PaintPropertyTreeBuilder_h
 
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/graphics/paint/ClipPaintPropertyNode.h"
 #include "platform/graphics/paint/EffectPaintPropertyNode.h"
@@ skipping 65 matching lines @@
 };
 
 // Creates paint property tree nodes for special things in the layout tree.
 // Special things include but not limit to: overflow clip, transform, fixed-pos,
 // animation, mask, filter, ... etc.
 // It expects to be invoked for each layout tree node in DOM order during
 // InPrePaint phase.
 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&,
                                            PaintPropertyTreeBuilderContext&);
   static void updateTransform(const LayoutObject&,
                               PaintPropertyTreeBuilderContext&);
   static void updateEffect(const LayoutObject&,
                            PaintPropertyTreeBuilderContext&);
   static void updateCssClip(const LayoutObject&,
                             PaintPropertyTreeBuilderContext&);
@@ skipping 15 matching lines @@
   static void updateScrollAndScrollTranslation(
       const LayoutObject&,
       PaintPropertyTreeBuilderContext&);
   static void updateOutOfFlowContext(const LayoutObject&,
                                      PaintPropertyTreeBuilderContext&);
 };
 
 }  // namespace blink
 
 #endif  // PaintPropertyTreeBuilder_h