Extend PropertyHandle to include custom property identifiers

third_party/WebKit/Source/core/animation/PropertyHandle.cpp

 // Copyright 2015 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.
 
 #include "core/animation/PropertyHandle.h"
 
 namespace blink {
 
 bool PropertyHandle::operator==(const PropertyHandle& other) const
 {
     if (m_handleType != other.m_handleType)
         return false;
 
     switch (m_handleType) {
     case HandleCSSProperty:
     case HandlePresentationAttribute:
         return m_cssProperty == other.m_cssProperty;
+    case HandleCSSCustomProperty:
+        return m_propertyName == other.m_propertyName;
     case HandleSVGAttribute:
         return m_svgAttribute == other.m_svgAttribute;
     default:
         return true;
     }
 }
 
 unsigned PropertyHandle::hash() const
 {
     switch (m_handleType) {
     case HandleCSSProperty:
         return m_cssProperty;
+    case HandleCSSCustomProperty:
+        return m_propertyName->existingHash();
     case HandlePresentationAttribute:
         return -m_cssProperty;
     case HandleSVGAttribute:
         return QualifiedNameHash::hash(*m_svgAttribute);
     default:
         NOTREACHED();
         return 0;
     }
 }
 
 } // namespace blink