Refactor to centralize code which decides whether ObjectPaintProperties are needed.

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 143 matching lines @@
                                               PaintPropertyTreeBuilderContext&);
   ALWAYS_INLINE static void UpdateSvgLocalToBorderBoxTransform(
       const LayoutObject&,
       PaintPropertyTreeBuilderContext&);
   ALWAYS_INLINE static void UpdateScrollAndScrollTranslation(
       const LayoutObject&,
       PaintPropertyTreeBuilderContext&);
   ALWAYS_INLINE static void UpdateOutOfFlowContext(
       const LayoutObject&,
       PaintPropertyTreeBuilderContext&);
+
+  // Ensure the ObjectPaintProperties object is created if it will be needed, or
+  // cleared otherwise.
+  ALWAYS_INLINE static void UpdatePaintProperties(
+      const LayoutObject&,
+      PaintPropertyTreeBuilderContext&);
 };
 
 }  // namespace blink
 
 #endif  // PaintPropertyTreeBuilder_h