Vibration cannot be canceled during pattern vibration.

Source/modules/testing/InternalsVibration.cpp

Index: Source/modules/testing/InternalsVibration.cpp
diff --git a/Source/core/svg/SVGUnknownElement.cpp b/Source/modules/testing/InternalsVibration.cpp
similarity index 82%
copy from Source/core/svg/SVGUnknownElement.cpp
copy to Source/modules/testing/InternalsVibration.cpp
index ecc0d2f2f186434ad83a947d92cca241c2bfa3b0..09792a0fb24c0e5198de516f121e27b3776d1477 100644
--- a/Source/core/svg/SVGUnknownElement.cpp
+++ b/Source/modules/testing/InternalsVibration.cpp
@@ -29,13 +29,18 @@
  */
 
 #include "config.h"
-#include "core/svg/SVGUnknownElement.h"
+#include "InternalsVibration.h"
+
+#include "core/dom/Document.h"
+#include "core/testing/Internals.h"
+#include "modules/vibration/NavigatorVibration.h"
 
 namespace WebCore {
 
-SVGUnknownElement::SVGUnknownElement(const QualifiedName& tagName, Document* document)
-    : SVGElement(tagName, document)
+bool InternalsVibration::isVibrating(Internals* internals, Document* document)
 {
+    ASSERT(internals && document && document->page());
+    return NavigatorVibration::from(document->page())->isVibrating();
 }
 
 } // namespace WebCore