[Typed-OM] Add CSSVariableReferenceValue

third_party/WebKit/Source/core/css/cssom/CSSVariableReferenceValue.idl

Index: third_party/WebKit/Source/core/css/cssom/CSSVariableReferenceValue.idl
diff --git a/third_party/WebKit/Source/core/css/cssom/CSSVariableReferenceValue.idl b/third_party/WebKit/Source/core/css/cssom/CSSVariableReferenceValue.idl
new file mode 100644
index 0000000000000000000000000000000000000000..4e766310733c2f2743ab4eb3d5b2604643264f81
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/cssom/CSSVariableReferenceValue.idl
@@ -0,0 +1,15 @@
+// Copyright 2016 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.
+
+[
+    // TODO(anthonyhkf): add fallback: Constructor(DOMString variable, CSSTokenStreamValue fallback)
+    Constructor(DOMString variable),
+    Exposed=(Window,PaintWorklet),
+    RuntimeEnabled=CSSTypedOM,
+    // TODO(anthonyhkf): rename CSSStyleVariableReferenceValue
+    ImplementedAs=CSSStyleVariableReferenceValue
+] interface CSSVariableReferenceValue {
+    readonly attribute DOMString variable;
+    // TODO(anthonyhkf): add fallback: readonly attribute CSSTokenStreamValue fallback;
+};