Add forEach() to CSSVariablesMap

Source/core/css/CSSVariablesIterator.h

Index: Source/core/css/CSSVariablesIterator.h
diff --git a/Source/modules/quota/StorageQuotaCallback.h b/Source/core/css/CSSVariablesIterator.h
similarity index 73%
copy from Source/modules/quota/StorageQuotaCallback.h
copy to Source/core/css/CSSVariablesIterator.h
index d281f4965552fc182b255a23931913f3b5a3d6b4..edfe3a7e9ed35eab3b31e92f0cdc22d259750eba 100644
--- a/Source/modules/quota/StorageQuotaCallback.h
+++ b/Source/core/css/CSSVariablesIterator.h
@@ -11,9 +11,6 @@
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
@@ -28,19 +25,25 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef StorageQuotaCallback_h
-#define StorageQuotaCallback_h
+#ifndef CSSVariablesIterator_h
+#define CSSVariablesIterator_h
 
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class StorageQuotaCallback : public RefCounted<StorageQuotaCallback> {
+class CSSVariablesIterator : public RefCounted<CSSVariablesIterator> {
 public:
-    virtual ~StorageQuotaCallback() { }
-    virtual bool handleEvent(unsigned long long grantedQuotaInBytes) = 0;
+    virtual ~CSSVariablesIterator() { }
+    virtual void advance() = 0;
+    virtual bool atEnd() const = 0;
+    virtual AtomicString name() const = 0;
+    virtual String value() const = 0;
+    virtual void addedVariable(const AtomicString& name) { }
+    virtual void removedVariable(const AtomicString& name) { }
+    virtual void clearedVariables() { }
 };
 
-} // namespace
+}
 
-#endif // StorageQuotaCallback_h
+#endif // CSSVariablesIterator_h