Improve performance when calling PaintLayer::setNeedsRepaint()

third_party/WebKit/Source/core/layout/PaintInvalidationState.h

Index: third_party/WebKit/Source/core/layout/PaintInvalidationState.h
diff --git a/third_party/WebKit/Source/core/layout/PaintInvalidationState.h b/third_party/WebKit/Source/core/layout/PaintInvalidationState.h
index 22962f2a486d888b8114b711d19567608f9b7950..a44be56a3706bd3ac35ef4e8548e732a73962eae 100644
--- a/third_party/WebKit/Source/core/layout/PaintInvalidationState.h
+++ b/third_party/WebKit/Source/core/layout/PaintInvalidationState.h
@@ -16,6 +16,7 @@ class LayoutBoxModelObject;
 class LayoutObject;
 class LayoutSVGModelObject;
 class LayoutView;
+class PaintLayer;
 
 class PaintInvalidationState {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
@@ -58,6 +59,8 @@ public:
     bool viewClippingAndScrollOffsetDisabled() const { return m_viewClippingAndScrollOffsetDisabled; }
     void setViewClippingAndScrollOffsetDisabled(bool b) { m_viewClippingAndScrollOffsetDisabled = b; }
 
+    PaintLayer& enclosingLayer() const { return m_enclosingLayer; }
+
 private:
     PaintInvalidationState(const LayoutView&, Vector<LayoutObject*>& pendingDelayedPaintInvalidations, PaintInvalidationState* ownerPaintInvalidationState);
 
@@ -85,6 +88,8 @@ private:
     AffineTransform m_svgTransform;
 
     Vector<LayoutObject*>& m_pendingDelayedPaintInvalidations;
+
+    PaintLayer& m_enclosingLayer;
 };
 
 } // namespace blink