Hook up style invalidation for CSS Paint API.

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

Index: third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h
diff --git a/third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h b/third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h
index 3f5b03db120f81dc2ade1de04d79c1a71d7878b9..beff0e2dc1a133d47c8282f1f3bb84c8b0d82e79 100644
--- a/third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h
+++ b/third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h
@@ -5,6 +5,7 @@
 #ifndef CSSPaintImageGenerator_h
 #define CSSPaintImageGenerator_h
 
+#include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/heap/Handle.h"
@@ -39,6 +40,9 @@ public:
     // representing an invalid image if an error occurred.
     virtual PassRefPtr<Image> paint(const IntSize&) = 0;
 
+    virtual const Vector<CSSPropertyID>& nativeInvalidationProperties() const = 0;
+    virtual const Vector<AtomicString>& customInvalidationProperties() const = 0;
+
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 };