Revert "CSS Custom Properties (Variables)"

third_party/WebKit/Source/core/css/CSSVariableReferenceValue.cpp

Index: third_party/WebKit/Source/core/css/CSSVariableReferenceValue.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSVariableReferenceValue.cpp b/third_party/WebKit/Source/core/css/CSSVariableReferenceValue.cpp
deleted file mode 100644
index c231b8a84a6c7a36b3adb07a4502379d44366f7c..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/css/CSSVariableReferenceValue.cpp
+++ /dev/null
@@ -1,22 +0,0 @@
-// 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 "config.h"
-#include "core/css/CSSVariableReferenceValue.h"
-
-namespace blink {
-
-DEFINE_TRACE_AFTER_DISPATCH(CSSVariableReferenceValue)
-{
-    visitor->trace(m_data);
-    CSSValue::traceAfterDispatch(visitor);
-}
-
-String CSSVariableReferenceValue::customCSSText() const
-{
-    // We may want to consider caching this value.
-    return m_data->tokenRange().serialize();
-}
-
-} // namespace blink