Fix JS_WIDESTRING to work with clang-cl

fpdfsdk/include/javascript/JS_Define.h

 // Copyright 2014 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 _JS_DEFINE_H_
 #define _JS_DEFINE_H_
 
 typedef v8::Value                       JSValue;
@@ skipping 26 matching lines @@
 typedef CFX_WideString  JS_ErrorString;
 
 #define JS_TRUE                 (unsigned)1
 #define JS_FALSE                (unsigned)0
 
 
 #define CJS_PointsArray         CFX_ArrayTemplate<float>
 #define CJS_IntArray            CFX_ArrayTemplate<int>
 
 /* ====================================== PUBLIC DEFINE SPEC ============================================== */
-#ifndef __GNUC__
-#define JS_WIDESTRING(widestring) L#widestring
-#else
-#define JS_WIDESTRING(widestring) L""#widestring
-#endif
+#define JS_WIDESTRING(widestring) L###widestring
 
 #define OBJ_PROP_PARAMS                 IFXJS_Context* cc, CJS_PropValue& vp, JS_ErrorString& sError
 #define OBJ_METHOD_PARAMS               IFXJS_Context* cc, const CJS_Parameters& params, CJS_Value& vRet, JS_ErrorString& sError
 #define BEGIN_JS_STATIC_CONST(js_class_name) JSConstSpec js_class_name::JS_Class_Consts[] = {
 #define JS_STATIC_CONST_ENTRY_NUMBER(const_name, pValue) {JS_WIDESTRING(const_name), pValue, L"", 0},
 #define JS_STATIC_CONST_ENTRY_STRING(const_name, pValue) {JS_WIDESTRING(const_name), 0, JS_WIDESTRING(pValue), 1},
 #define END_JS_STATIC_CONST() {0, 0, 0, 0}};
 
 #define BEGIN_JS_STATIC_PROP(js_class_name) JSPropertySpec js_class_name::JS_Class_Properties[] = {
 #define JS_STATIC_PROP_ENTRY(prop_name) {JS_WIDESTRING(prop_name), get_##prop_name##_static, set_##prop_name##_static},
@@ skipping 714 matching lines @@
                 else if (strcmp(sType,VALUE_NAME_NULL) == 0)
                         return VT_null;
                 else if (strcmp(sType,VALUE_NAME_UNDEFINED) == 0)
                         return VT_undefined;
                         */
 
         return VT_unknown;
 }
 
 #endif //_JS_DEFINE_H_