diff -r 000000000000 -r 6474c204b198 layout/style/nsDOMCSSValueList.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/nsDOMCSSValueList.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,72 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* DOM object representing lists of values in DOM computed style */
+
+#ifndef nsDOMCSSValueList_h___
+#define nsDOMCSSValueList_h___
+
+#include "nsIDOMCSSValueList.h"
+#include "CSSValue.h"
+#include "nsTArray.h"
+
+class nsDOMCSSValueList MOZ_FINAL : public mozilla::dom::CSSValue,
+  public nsIDOMCSSValueList
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsDOMCSSValueList, mozilla::dom::CSSValue)
+
+  // nsIDOMCSSValue
+  NS_DECL_NSIDOMCSSVALUE
+
+  // nsDOMCSSValueList
+  nsDOMCSSValueList(bool aCommaDelimited, bool aReadonly);
+  ~nsDOMCSSValueList();
+
+  /**
+   * Adds a value to this list.
+   */
+  void AppendCSSValue(CSSValue* aValue);
+
+  virtual void GetCssText(nsString& aText, mozilla::ErrorResult& aRv)
+    MOZ_OVERRIDE MOZ_FINAL;
+  virtual void SetCssText(const nsAString& aText,
+                          mozilla::ErrorResult& aRv) MOZ_OVERRIDE MOZ_FINAL;
+  virtual uint16_t CssValueType() const MOZ_OVERRIDE MOZ_FINAL;
+
+  CSSValue* IndexedGetter(uint32_t aIdx, bool& aFound) const
+  {
+    aFound = aIdx <= Length();
+    return Item(aIdx);
+  }
+
+  CSSValue* Item(uint32_t aIndex) const
+  {
+    return mCSSValues.SafeElementAt(aIndex);
+  }
+
+  uint32_t Length() const
+  {
+    return mCSSValues.Length();
+  }
+
+  nsISupports* GetParentObject()
+  {
+    return nullptr;
+  }
+
+  virtual JSObject *WrapObject(JSContext *cx) MOZ_OVERRIDE;
+
+private:
+  bool                        mCommaDelimited;  // some value lists use a comma
+                                                // as the delimiter, some just use
+                                                // spaces.
+
+  bool                        mReadonly;    // Are we read-only?
+
+  InfallibleTArray<nsRefPtr<CSSValue> > mCSSValues;
+};
+
+#endif /* nsDOMCSSValueList_h___ */