Split out String, URI and CustomIdent from CSSPrimitiveValue

Source/core/css/CSSStringValueBase.h

Index: Source/core/css/CSSStringValueBase.h
diff --git a/Source/core/css/CSSStringValueBase.h b/Source/core/css/CSSStringValueBase.h
new file mode 100644
index 0000000000000000000000000000000000000000..b9fe9e9c3bd6d3ce042e55928348b3f735afa543
--- /dev/null
+++ b/Source/core/css/CSSStringValueBase.h
@@ -0,0 +1,55 @@
+// 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.
+
+#ifndef CSSStringValueBase_h
+#define CSSStringValueBase_h
+
+#include "core/CoreExport.h"
+#include "core/css/CSSValue.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
+
+namespace blink {
+
+template <CSSValue::ClassType T>
+class CORE_EXPORT CSSStringValueBase : public CSSValue {

[Timothy Loh, 2015/09/17 05:35:01]

does this need to CORE_EXPORT?

[sashab, 2015/09/21 01:13:27]

Nope; removed.

+public:
+    static PassRefPtrWillBeRawPtr<CSSStringValueBase> create(const String& str)
+    {
+        return adoptRefWillBeNoop(new CSSStringValueBase(str));
+    }
+
+    String value() const { return m_string; }
+
+    String customCSSText() const;
+
+    bool equals(const CSSStringValueBase& other) const
+    {
+        return m_string == other.m_string;
+    }
+
+    DEFINE_INLINE_TRACE_AFTER_DISPATCH()
+    {
+        CSSValue::traceAfterDispatch(visitor);
+    }
+
+private:
+    CSSStringValueBase(const String& str)
+        : CSSValue(T)
+        , m_string(str) { }
+
+    String m_string;
+};
+
+using CSSStringValue = CSSStringValueBase<CSSValue::StringClass>;
+using CSSCustomIdentValue = CSSStringValueBase<CSSValue::CustomIdentClass>;
+using CSSURIValue = CSSStringValueBase<CSSValue::URIClass>;
+
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSStringValue, isStringValue());
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSCustomIdentValue, isCustomIdentValue());
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSURIValue, isURIValue());
+
+} // namespace blink
+
+#endif // CSSStringValueBase_h