Create classes for XFA JS objects

This CL creates classes for the various XFA JS objects. The method
calls from xfa_basic_data_element_script have been modified to call
these methods instead of methods in CJX_Object.

Change-Id: Idb2de38656f7e8edc559d44921eba25073e6c806
Reviewed-on: https://pdfium-review.googlesource.com/21110
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
diff --git a/fxjs/xfa/cjx_boolean.h b/fxjs/xfa/cjx_boolean.h
new file mode 100644
index 0000000..c90291a
--- /dev/null
+++ b/fxjs/xfa/cjx_boolean.h
@@ -0,0 +1,25 @@
+// Copyright 2017 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 FXJS_XFA_CJX_BOOLEAN_H_
+#define FXJS_XFA_CJX_BOOLEAN_H_
+
+#include "fxjs/xfa/cjx_content.h"
+
+class CXFA_Boolean;
+
+class CJX_Boolean : public CJX_Content {
+ public:
+  explicit CJX_Boolean(CXFA_Boolean* node);
+  ~CJX_Boolean() override;
+
+  JS_PROP(use);
+  JS_PROP(defaultValue); /* {default} */
+  JS_PROP(usehref);
+  JS_PROP(value);
+};
+
+#endif  // FXJS_XFA_CJX_BOOLEAN_H_