Remove some c_str() calls from StringCs in xfa docs.

xfa/fxfa/fm2js/xfa_fm2jscontext.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 "xfa/fxfa/fm2js/xfa_fm2jscontext.h"
 
 #include <time.h>
 
@@ skipping 5422 matching lines @@
     }
     IXFA_AppProvider* pAppProvider =
         pDoc->GetParser()->GetNotify()->GetAppProvider();
     if (!pAppProvider) {
       return;
     }
     FXJSE_HVALUE argOne = GetSimpleHValue(hThis, args, 0);
     CFX_ByteString urlString;
     HValueToUTF8String(argOne, urlString);
     IFX_FileRead* pFile = pAppProvider->DownloadURL(
-        CFX_WideString::FromUTF8(urlString.AsStringC()).AsStringC());
+        CFX_WideString::FromUTF8(urlString.AsStringC()));
     if (pFile) {
       int32_t size = pFile->GetSize();
       uint8_t* pData = FX_Alloc(uint8_t, size);
       pFile->ReadBlock(pData, size);
       FXJSE_Value_SetUTF8String(args.GetReturnValue(),
                                 CFX_ByteStringC(pData, size));
       FX_Free(pData);
       pFile->Release();
     }
     FXJSE_Value_Release(argOne);
@@ skipping 39 matching lines @@
     if (argc > 3) {
       argFour = GetSimpleHValue(hThis, args, 3);
       HValueToUTF8String(argFour, bsEncode);
     }
     if (argc > 4) {
       argFive = GetSimpleHValue(hThis, args, 4);
       HValueToUTF8String(argFive, bsHeader);
     }
     CFX_WideString decodedResponse;
     FX_BOOL bFlags = pAppProvider->PostRequestURL(
-        CFX_WideString::FromUTF8(bsURL.AsStringC()).AsStringC(),
-        CFX_WideString::FromUTF8(bsData.AsStringC()).AsStringC(),
-        CFX_WideString::FromUTF8(bsContentType.AsStringC()).AsStringC(),
-        CFX_WideString::FromUTF8(bsEncode.AsStringC()).AsStringC(),
-        CFX_WideString::FromUTF8(bsHeader.AsStringC()).AsStringC(),
-        decodedResponse);
+        CFX_WideString::FromUTF8(bsURL.AsStringC()),
+        CFX_WideString::FromUTF8(bsData.AsStringC()),
+        CFX_WideString::FromUTF8(bsContentType.AsStringC()),
+        CFX_WideString::FromUTF8(bsEncode.AsStringC()),
+        CFX_WideString::FromUTF8(bsHeader.AsStringC()), decodedResponse);
     FXJSE_Value_Release(argOne);
     FXJSE_Value_Release(argTwo);
     if (argc > 2) {
       FXJSE_Value_Release(argThree);
     }
     if (argc > 3) {
       FXJSE_Value_Release(argFour);
     }
     if (argc > 4) {
       FXJSE_Value_Release(argFive);
@@ skipping 35 matching lines @@
     FXJSE_HVALUE argThree;
     argOne = GetSimpleHValue(hThis, args, 0);
     HValueToUTF8String(argOne, bsURL);
     argTwo = GetSimpleHValue(hThis, args, 1);
     HValueToUTF8String(argTwo, bsData);
     if (argc > 2) {
       argThree = GetSimpleHValue(hThis, args, 2);
       HValueToUTF8String(argThree, bsEncode);
     }
     FX_BOOL bFlags = pAppProvider->PutRequestURL(
-        CFX_WideString::FromUTF8(bsURL.AsStringC()).AsStringC(),
-        CFX_WideString::FromUTF8(bsData.AsStringC()).AsStringC(),
-        CFX_WideString::FromUTF8(bsEncode.AsStringC()).AsStringC());
+        CFX_WideString::FromUTF8(bsURL.AsStringC()),
+        CFX_WideString::FromUTF8(bsData.AsStringC()),
+        CFX_WideString::FromUTF8(bsEncode.AsStringC()));
     FXJSE_Value_Release(argOne);
     FXJSE_Value_Release(argTwo);
     if (argc > 2) {
       FXJSE_Value_Release(argThree);
     }
     if (bFlags) {
       FXJSE_Value_SetUTF8String(args.GetReturnValue(), "");
     } else {
       pContext->ThrowScriptErrorMessage(XFA_IDS_SERVER_DENY);
     }
@@ skipping 1635 matching lines @@
   CFX_WideString wsFormat;
   pAppProvider->LoadString(iStringID, wsFormat);
   CFX_WideString wsMessage;
   va_list arg_ptr;
   va_start(arg_ptr, iStringID);
   wsMessage.FormatV(wsFormat.c_str(), arg_ptr);
   va_end(arg_ptr);
   FXJSE_ThrowMessage(
       "", FX_UTF8Encode(wsMessage.c_str(), wsMessage.GetLength()).AsStringC());
 }