Support Promises instrumentation on backend.

Source/bindings/v8/ScriptObjectTraits.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef SVGAnimatedPath_h
-#define SVGAnimatedPath_h
+#ifndef ScriptObjectTraits_h
+#define ScriptObjectTraits_h
 
-#include "core/svg/SVGPathSegListTearOff.h"
-#include "core/svg/properties/NewSVGAnimatedProperty.h"
+#include "bindings/v8/ScriptObject.h"
+#include "bindings/v8/ScriptState.h"
+#include "wtf/HashTraits.h"
 
 namespace WebCore {
 
-class SVGPathElement;
+struct ScriptObjectHash {
+    static unsigned hash(const ScriptObject& object) { return object.v8Object()->GetIdentityHash(); }
+    static bool equal(const ScriptObject& a, const ScriptObject& b) { return a == b; }
+    static const bool safeToCompareToEmptyOrDeleted = true;
+};
 
-class SVGAnimatedPath : public NewSVGAnimatedProperty<SVGPathSegList> {
-public:
-    virtual ~SVGAnimatedPath();
-
-    static PassRefPtr<SVGAnimatedPath> create(SVGPathElement* contextElement, const QualifiedName& attributeName)
-    {
-        return adoptRef(new SVGAnimatedPath(contextElement, attributeName));
-    }
-
-protected:
-    SVGAnimatedPath(SVGPathElement*, const QualifiedName&);
+struct ScriptObjectHashTraits : WTF::GenericHashTraits<ScriptObject> {
+    static const bool emptyValueIsZero = false;
+    static ScriptObject emptyValue() { return ScriptObject(ScriptState::current(), ScriptValue::createNull()); }
+    static void constructDeletedValue(ScriptObject& slot) { slot = ScriptObject(); }
+    static bool isDeletedValue(ScriptObject value) { return value.hasNoValue(); }
 };
 
 } // namespace WebCore
 
-#endif // SVGAnimatedPath_h
+#endif // !defined(ScriptObjectTraits_h)