Hook up style invalidation for CSS Paint API.

third_party/WebKit/Source/core/css/CSSPaintValue.h

Index: third_party/WebKit/Source/core/css/CSSPaintValue.h
diff --git a/third_party/WebKit/Source/core/css/CSSPaintValue.h b/third_party/WebKit/Source/core/css/CSSPaintValue.h
index 07eb74ca86e61d44b8078e2d150d61312b932427..b29224d8ea4a7d6a6aed7633e420aec5d0993839 100644
--- a/third_party/WebKit/Source/core/css/CSSPaintValue.h
+++ b/third_party/WebKit/Source/core/css/CSSPaintValue.h
@@ -35,6 +35,15 @@ public:
 
     bool equals(const CSSPaintValue&) const;
 
+    const Vector<CSSPropertyID>* nativeInvalidationProperties() const
+    {
+        return m_generator ? &m_generator->nativeInvalidationProperties() : nullptr;
+    }
+    const Vector<AtomicString>* customInvalidationProperties() const
+    {
+        return m_generator ? &m_generator->customInvalidationProperties() : nullptr;
+    }
+
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private: