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..9b47049d3e1e0ffa87e6e4d492f161bfc174ca5f 100644
--- a/third_party/WebKit/Source/core/css/CSSPaintValue.h
+++ b/third_party/WebKit/Source/core/css/CSSPaintValue.h
@@ -28,13 +28,22 @@ public:
     bool isFixedSize() const { return false; }
     IntSize fixedSize(const LayoutObject&) { return IntSize(); }
 
-    bool isPending() const { return false; }
+    bool isPending() const { return true; }
     bool knownToBeOpaque(const LayoutObject&) const { return false; }
 
     void loadSubimages(Document*) { }
 
     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: