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diff --git a/fxjs/cfx_v8.h b/fxjs/cfx_v8.h
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+// 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_CFX_V8_H_
+#define FXJS_CFX_V8_H_
+
+#include <map>
+#include <vector>
+
+#include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/unowned_ptr.h"
+#include "v8/include/v8-util.h"
+#include "v8/include/v8.h"
+
+class CFX_V8 {
+ public:
+  explicit CFX_V8(v8::Isolate* pIsolate);
+  virtual ~CFX_V8();
+
+  v8::Isolate* GetIsolate() const { return m_isolate; }
+
+  v8::Local<v8::Value> NewNull();
+  v8::Local<v8::Value> NewUndefined();
+  v8::Local<v8::Array> NewArray();
+  v8::Local<v8::Object> NewObject();
+  v8::Local<v8::Number> NewNumber(int number);
+  v8::Local<v8::Number> NewNumber(double number);
+  v8::Local<v8::Number> NewNumber(float number);
+  v8::Local<v8::Boolean> NewBoolean(bool b);
+  v8::Local<v8::String> NewString(const ByteStringView& str);
+  v8::Local<v8::String> NewString(const WideStringView& str);
+  v8::Local<v8::Date> NewDate(double d);
+
+  int ToInt32(v8::Local<v8::Value> pValue);
+  bool ToBoolean(v8::Local<v8::Value> pValue);
+  double ToDouble(v8::Local<v8::Value> pValue);
+  WideString ToWideString(v8::Local<v8::Value> pValue);
+  ByteString ToByteString(v8::Local<v8::Value> pValue);
+  v8::Local<v8::Object> ToObject(v8::Local<v8::Value> pValue);
+  v8::Local<v8::Array> ToArray(v8::Local<v8::Value> pValue);
+
+  // Arrays.
+  unsigned GetArrayLength(v8::Local<v8::Array> pArray);
+  v8::Local<v8::Value> GetArrayElement(v8::Local<v8::Array> pArray,
+                                       unsigned index);
+  unsigned PutArrayElement(v8::Local<v8::Array> pArray,
+                           unsigned index,
+                           v8::Local<v8::Value> pValue);
+
+  // Objects.
+  std::vector<WideString> GetObjectPropertyNames(v8::Local<v8::Object> pObj);
+  v8::Local<v8::Value> GetObjectProperty(v8::Local<v8::Object> pObj,
+                                         const WideString& PropertyName);
+  void PutObjectProperty(v8::Local<v8::Object> pObj,
+                         const WideString& PropertyName,
+                         v8::Local<v8::Value> pValue);
+
+ protected:
+  void SetIsolate(v8::Isolate* pIsolate) { m_isolate = pIsolate; }
+
+ private:
+  v8::Isolate* m_isolate;
+};
+
+#endif  // FXJS_CFX_V8_H_