Store and propagate a list of applied text decorations.

Source/core/rendering/style/AppliedTextDecoration.h

Index: Source/core/rendering/style/AppliedTextDecoration.h
diff --git a/Source/core/rendering/style/AppliedTextDecoration.h b/Source/core/rendering/style/AppliedTextDecoration.h
new file mode 100644
index 0000000000000000000000000000000000000000..680254b8980e9062d978a64fbd567f2dddf222a9
--- /dev/null
+++ b/Source/core/rendering/style/AppliedTextDecoration.h
@@ -0,0 +1,28 @@
+// Copyright 2014 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 AppliedTextDecoration_h
+#define AppliedTextDecoration_h
+
+#include "core/rendering/style/RenderStyleConstants.h"
+
+namespace WebCore {
+
+class AppliedTextDecoration {
+public:
+    explicit AppliedTextDecoration(TextDecoration);
+    AppliedTextDecoration();
+
+    TextDecoration line() const { return static_cast<TextDecoration>(m_line); }
+
+    bool operator==(const AppliedTextDecoration&) const;
+    bool operator!=(const AppliedTextDecoration& o) const { return !(*this == o); }
+
+private:
+    unsigned m_line : TextDecorationBits;
+};
+
+} // namespace WebCore
+
+#endif // AppliedTextDecoration_h