Web Animations: Throw TypeErrors for invalid timing parameters

third_party/WebKit/Source/core/style/DataEquivalency.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DataEquivalency_h
 #define DataEquivalency_h
 
 #include "wtf/OwnPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
+template<typename T>
+class Persistent;
+template<typename T>
+class Member;
+
 template <typename T>
 bool dataEquivalent(const T* a, const T* b)
 {
     if (a == b)
         return true;
     if (!a || !b)
         return false;
     return *a == *b;
 }
 
@@ skipping 17 matching lines @@
 
 template <typename T>
 bool dataEquivalent(const OwnPtr<T>& a, const OwnPtr<T>& b)
 {
     return dataEquivalent(a.get(), b.get());
 }
 
 } // namespace blink
 
 #endif // DataEquivalency_h