Skip paint property update and visual rect update if no geometry change

third_party/WebKit/Source/core/paint/PrePaintTreeWalk.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 PrePaintTreeWalk_h
 #define PrePaintTreeWalk_h
 
 #include "core/paint/ClipRect.h"
 #include "core/paint/PaintInvalidator.h"
 #include "core/paint/PaintPropertyTreeBuilder.h"
@@ skipping 27 matching lines @@
   // contaiing block context + effect, in the space of ancestorState adjusted
   // by ancestorPaintOffset. Sets hasClip to true if a clip was applied.
   void computeClipRectForContext(
       const PaintPropertyTreeBuilderContext::ContainingBlockContext&,
       const EffectPaintPropertyNode*,
       const PropertyTreeState& ancestorState,
       const LayoutPoint& ancestorPaintOffset,
       bool& hasClip,
       FloatClipRect&);
 
-  // Returns true if the tree walk should stop before processing this object.
-  bool shouldEndWalkBefore(const LayoutObject&, const PrePaintTreeWalkContext&);
+  bool ALWAYS_INLINE
+  needsTreeBuilderContextUpdate(const FrameView&,
+                                const PrePaintTreeWalkContext&);
+  bool ALWAYS_INLINE
+  needsTreeBuilderContextUpdate(const LayoutObject&,
+                                const PrePaintTreeWalkContext&);
 
   PaintPropertyTreeBuilder m_propertyTreeBuilder;
   PaintInvalidator m_paintInvalidator;
   GeometryMapper& m_geometryMapper;
 };
 
 }  // namespace blink
 
 #endif  // PrePaintTreeWalk_h