[SVG] Transform animation leaves traces of text behind.

Source/core/rendering/PaintInfo.h

Index: Source/core/rendering/PaintInfo.h
diff --git a/Source/core/rendering/PaintInfo.h b/Source/core/rendering/PaintInfo.h
index c6940e37cde32f78377b83b9ab8ad7c9f2e7764a..50b6463a1a4112ce00b50ecd6bfe497659de5ce1 100644
--- a/Source/core/rendering/PaintInfo.h
+++ b/Source/core/rendering/PaintInfo.h
@@ -95,7 +95,10 @@ struct PaintInfo {
         if (rect == infiniteRect())
             return;
 
-        rect = localToAncestorTransform.inverse().mapRect(rect);
+        if (localToAncestorTransform.isInvertible())
+            rect = localToAncestorTransform.inverse().mapRect(rect);
+        else
+            rect.setSize(IntSize(0, 0));
     }
 
     static IntRect infiniteRect() { return IntRect(LayoutRect::infiniteRect()); }