[SPInvalidation] Fix paint offset issue of descendants of composited svg root

third_party/WebKit/Source/core/paint/ObjectPaintProperties.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 ObjectPaintProperties_h
 #define ObjectPaintProperties_h
 
 #include "core/CoreExport.h"
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/graphics/paint/ClipPaintPropertyNode.h"
@@ skipping 83 matching lines @@
     // baked into in the context here. However for properties that affects only children,
     // for example, perspective and overflow clip, those should be applied by the painter
     // at the right painting step.
     // TODO(pdr): Refactor this to use PropertyTreeState.
     struct LocalBorderBoxProperties {
         LayoutPoint paintOffset;
         GeometryPropertyTreeState geometryPropertyTreeState;
         const ScrollPaintPropertyNode* scroll;
     };
     const LocalBorderBoxProperties* localBorderBoxProperties() const { return m_localBorderBoxProperties.get(); }
-    // ContentsProperties is the GeometryPropertyTreeState that is the same as in
+    // ContentsPropertyTreeState is the GeometryPropertyTreeState that is the same as in
     // localBorderBoxProperties, except that it is inside any clips and scrolls caused by this
     // object. This GeometryPropertyTreeState is suitable as the destination for paint invalidation.
-    void getContentsProperties(GeometryPropertyTreeState&) const;
+    // |paintOffsetFromState| is the offset from the GeometryPropertyTreeState to this object's
+    // contents space.
+    void getContentsPropertyTreeState(GeometryPropertyTreeState&, LayoutPoint& paintOffsetFromState) const;
 
     void clearPaintOffsetTranslation() { m_paintOffsetTranslation = nullptr; }
     void clearTransform() { m_transform = nullptr; }
     void clearEffect() { m_effect = nullptr; }
     void clearCssClip() { m_cssClip = nullptr; }
     void clearCssClipFixedPosition() { m_cssClipFixedPosition = nullptr; }
     void clearOverflowClip() { m_overflowClip = nullptr; }
     void clearPerspective() { m_perspective = nullptr; }
     void clearSvgLocalToBorderBoxTransform() { m_svgLocalToBorderBoxTransform = nullptr; }
     void clearScrollTranslation() { m_scrollTranslation = nullptr; }
@@ skipping 47 matching lines @@
     RefPtr<TransformPaintPropertyNode> m_scrollTranslation;
     RefPtr<TransformPaintPropertyNode> m_scrollbarPaintOffset;
     RefPtr<ScrollPaintPropertyNode> m_scroll;
 
     std::unique_ptr<LocalBorderBoxProperties> m_localBorderBoxProperties;
 };
 
 } // namespace blink
 
 #endif // ObjectPaintProperties_h