Split fpdf_parser_objects.cpp into per-class .cpp/.h files.

core/include/fpdfapi/cpdf_null.h

Index: core/include/fpdfapi/cpdf_null.h
diff --git a/core/include/fpdfapi/cpdf_null.h b/core/include/fpdfapi/cpdf_null.h
new file mode 100644
index 0000000000000000000000000000000000000000..654c2a40291dcf406bfbb5f1e19299b82cb95342
--- /dev/null
+++ b/core/include/fpdfapi/cpdf_null.h
@@ -0,0 +1,21 @@
+// 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 CORE_INCLUDE_FPDFAPI_CPDF_NULL_H_
+#define CORE_INCLUDE_FPDFAPI_CPDF_NULL_H_
+
+#include "core/include/fpdfapi/cpdf_object.h"
+
+class CPDF_Null : public CPDF_Object {
+ public:
+  CPDF_Null();
+
+  // CPDF_Object.
+  Type GetType() const override;
+  CPDF_Object* Clone(FX_BOOL bDirect = FALSE) const override;
+};
+
+#endif  // CORE_INCLUDE_FPDFAPI_CPDF_NULL_H_