Reuse cc::PictureLayers when possible for SPv2.

third_party/WebKit/Source/core/paint/PaintInvalidator.cpp

Index: third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
index 98c7ff587eb23bc5538ef96a84bd6831d0211b32..11516baa8d041a5010ee940d57327f4dedd6ef19 100644
--- a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
@@ -53,12 +53,17 @@ static LayoutRect mapLocalRectToPaintInvalidationBacking(GeometryMapper& geometr
     } else if (object == context.paintInvalidationContainer) {
         result = LayoutRect(rect);
     } else {
+        rect.moveBy(FloatPoint(context.treeBuilderContext.current.paintOffset));
+
+        // In SPv2, visual rects are in the space of their local transform node.
+        if (RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+            return LayoutRect(rect);
+
         GeometryPropertyTreeState currentTreeState(context.treeBuilderContext.current.transform, context.treeBuilderContext.current.clip, context.treeBuilderContext.currentEffect);
         GeometryPropertyTreeState containerTreeState;
         const ObjectPaintProperties* containerPaintProperties = context.paintInvalidationContainer->objectPaintProperties();
         containerPaintProperties->getContentsProperties(containerTreeState);
 
-        rect.moveBy(FloatPoint(context.treeBuilderContext.current.paintOffset));
         bool success = false;
         result = LayoutRect(geometryMapper.mapToVisualRectInDestinationSpace(rect, currentTreeState, containerTreeState, success));
         DCHECK(success);