Support unknown property strings in transition-property

Source/core/animation/css/CSSTransitionData.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 CSSTransitionData_h
 #define CSSTransitionData_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/animation/css/CSSTimingData.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class CSSTransitionData FINAL : public CSSTimingData {
 public:
     enum TransitionPropertyType {
         TransitionNone,
         TransitionSingleProperty,
+        TransitionUnknown,
         TransitionAll
     };
 
-    // FIXME: This is incorrect as per CSS3 Transitions, we should allow the
-    // user to specify unknown properties and keep them in the list (crbug.com/304020).
-    // Also, we shouldn't allow 'none' to be used alongside other properties.
+    // FIXME: We shouldn't allow 'none' to be used alongside other properties.
     struct TransitionProperty {
         TransitionProperty(CSSPropertyID id)
             : propertyType(TransitionSingleProperty)
             , propertyId(id)
         {
             ASSERT(id != CSSPropertyInvalid);
         }
 
+        TransitionProperty(const String& string)
+            : propertyType(TransitionUnknown)
+            , propertyId(CSSPropertyInvalid)
+            , propertyString(string)
+        {
+        }
+
         TransitionProperty(TransitionPropertyType type)
             : propertyType(type)
             , propertyId(CSSPropertyInvalid)
         {
-            ASSERT(type != TransitionSingleProperty);
+            ASSERT(type == TransitionNone || type == TransitionAll);
         }
 
-        bool operator==(const TransitionProperty& other) const { return propertyType == other.propertyType && propertyId == other.propertyId; }
+        bool operator==(const TransitionProperty& other) const { return propertyType == other.propertyType && propertyId == other.propertyId && propertyString == other.propertyString; }
 
         TransitionPropertyType propertyType;
         CSSPropertyID propertyId;
+        String propertyString;
     };
 
     static PassOwnPtrWillBeRawPtr<CSSTransitionData> create()
     {
         return adoptPtrWillBeNoop(new CSSTransitionData);
     }
 
     static PassOwnPtrWillBeRawPtr<CSSTransitionData> create(const CSSTransitionData& transitionData)
     {
         return adoptPtrWillBeNoop(new CSSTransitionData(transitionData));
@@ skipping 11 matching lines @@
 private:
     CSSTransitionData();
     explicit CSSTransitionData(const CSSTransitionData&);
 
     Vector<TransitionProperty> m_propertyList;
 };
 
 } // namespace WebCore
 
 #endif // CSSTransitionData_h