Add forEach() to CSSVariablesMap

Source/core/css/CSSStyleDeclaration.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef CSSStyleDeclaration_h
 #define CSSStyleDeclaration_h
 
 #include "CSSPropertyNames.h"
 #include "bindings/v8/ScriptWrappable.h"
+#include "core/css/CSSVariablesIterator.h"
 #include "core/css/CSSVariablesMap.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 
 namespace WebCore {
 
 class CSSProperty;
 class CSSRule;
 class CSSStyleSheet;
 class CSSValue;
@@ skipping 18 matching lines @@
     virtual String getPropertyValue(const String& propertyName) = 0;
     virtual String getPropertyPriority(const String& propertyName) = 0;
     virtual String getPropertyShorthand(const String& propertyName) = 0;
     virtual bool isPropertyImplicit(const String& propertyName) = 0;
     virtual void setProperty(const String& propertyName, const String& value, const String& priority, ExceptionState&) = 0;
     virtual String removeProperty(const String& propertyName, ExceptionState&) = 0;
 
     PassRefPtr<CSSVariablesMap> var();
     virtual unsigned variableCount() const = 0;
     virtual String variableValue(const AtomicString& name) const = 0;
-    virtual void setVariableValue(const AtomicString& name, const String& value, ExceptionState&) = 0;
+    virtual bool setVariableValue(const AtomicString& name, const String& value, ExceptionState&) = 0; // Return value indicates whether variable was added.
     virtual bool removeVariable(const AtomicString& name) = 0;
-    virtual void clearVariables(ExceptionState&) = 0;
+    virtual bool clearVariables(ExceptionState&) = 0;
+    virtual PassRefPtr<CSSVariablesIterator> variablesIterator() const = 0;
 
     // CSSPropertyID versions of the CSSOM functions to support bindings and editing.
     // Use the non-virtual methods in the concrete subclasses when possible.
     // The CSSValue returned by this function should not be exposed to the web as it may be used by multiple documents at the same time.
     virtual PassRefPtr<CSSValue> getPropertyCSSValueInternal(CSSPropertyID) = 0;
     virtual String getPropertyValueInternal(CSSPropertyID) = 0;
     virtual void setPropertyInternal(CSSPropertyID, const String& value, bool important, ExceptionState&) = 0;
 
     virtual PassRefPtr<MutableStylePropertySet> copyProperties() const = 0;
 
     virtual bool cssPropertyMatches(CSSPropertyID, const CSSValue*) const = 0;
     virtual CSSStyleSheet* parentStyleSheet() const { return 0; }
 
 protected:
     CSSStyleDeclaration()
     {
         ScriptWrappable::init(this);
     }
     RefPtr<CSSVariablesMap> m_variablesMap;
 };
 
 } // namespace WebCore
 
 #endif // CSSStyleDeclaration_h