Get rid of FX_LPCSTR cast.

fpdfsdk/src/javascript/JS_Value.cpp

 // 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
 
 #include "../../include/javascript/JavaScript.h"
 #include "../../include/javascript/JS_Define.h"
 #include "../../include/javascript/JS_Object.h"
 #include "../../include/javascript/JS_Value.h"
@@ skipping 382 matching lines @@
         m_bIsSetting = 1;
 }
 
 void CJS_PropValue::StartGetting()
 {
         m_bIsSetting = 0;
 }
 void CJS_PropValue::operator <<(CFX_ByteString string)
 {
         ASSERT(!m_bIsSetting);
-        CJS_Value::operator =((FX_LPCSTR)string);
+        CJS_Value::operator = (string.c_str());
 }
 
 void CJS_PropValue::operator >>(CFX_ByteString &string) const
 {
         ASSERT(m_bIsSetting);
         string = CJS_Value::operator CFX_ByteString();
 }
 
 void CJS_PropValue::operator <<(FX_LPCWSTR c_string)
 {
@@ skipping 229 matching lines @@
                 return 0.0;
         return JS_ToNumber(m_pDate);
 }
 
 CFX_WideString CJS_Date::ToString() const
 {
         if(m_pDate.IsEmpty())
                 return L"";
         return JS_ToString(m_pDate);
 }