Split fxfa_objectacc.h into pieces.

xfa/fxfa/parser/cxfa_arc.h

Index: xfa/fxfa/parser/cxfa_arc.h
diff --git a/xfa/fxfa/parser/cxfa_arc.h b/xfa/fxfa/parser/cxfa_arc.h
new file mode 100644
index 0000000000000000000000000000000000000000..e712d806a724ee316a8bd75b6cbb8484e8218962
--- /dev/null
+++ b/xfa/fxfa/parser/cxfa_arc.h
@@ -0,0 +1,19 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef XFA_FXFA_PARSER_CXFA_ARC_H_
+#define XFA_FXFA_PARSER_CXFA_ARC_H_
+
+#include "xfa/fxfa/parser/cxfa_box.h"
+
+class CXFA_Node;
+
+class CXFA_Arc : public CXFA_Box {
+ public:
+  explicit CXFA_Arc(CXFA_Node* pNode) : CXFA_Box(pNode) {}
+};
+
+#endif  // XFA_FXFA_PARSER_CXFA_ARC_H_