Add support for SVG Clip paths in HTML

Source/core/rendering/RenderLayerClipPathInfo.h

Index: Source/core/rendering/RenderLayerClipPathInfo.h
diff --git a/Source/core/rendering/RenderLayerClipPathInfo.h b/Source/core/rendering/RenderLayerClipPathInfo.h
new file mode 100644
index 0000000000000000000000000000000000000000..a19ef73ae1a47514077146911aaaf00a98a24bf6
--- /dev/null
+++ b/Source/core/rendering/RenderLayerClipPathInfo.h
@@ -0,0 +1,35 @@
+// 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 RenderLayerClipPathInfo_h
+#define RenderLayerClipPathInfo_h
+
+#include "core/svg/SVGClipPathElement.h"
+#include "wtf/RefPtr.h"
+
+namespace blink {
+
+class ClipPathOperation;
+class RenderLayer;
+class RenderLayerClipPathInfo;
+
+class RenderLayerClipPathInfo {
+    WTF_MAKE_NONCOPYABLE(RenderLayerClipPathInfo);
+
+public:
+    explicit RenderLayerClipPathInfo(RenderLayer*);
+    virtual ~RenderLayerClipPathInfo();
+
+    void updateReferenceClipPathClients(ClipPathOperation*);
+    void removeReferenceClipPathClients();
+
+private:
+    RenderLayer* m_layer;
+
+    RefPtr<SVGClipPathElement> m_clipPathElement;
+};
+
+} // namespace blink
+
+#endif // RenderLayerClipPathInfo_h