Pass CFX_*StringCs to FX_HashCode_GETA and _GETW hash functions.

xfa/fxfa/fm2js/xfa_lexer.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_lexer.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 
@@ skipping 498 matching lines @@
       pEnd = p;
       return;
     }
     XFA_FMDChar::inc(p);
     ch = XFA_FMDChar::get(p);
   }
   pEnd = p;
 }
 
 XFA_FM_TOKEN CXFA_FMLexer::IsKeyword(const CFX_WideStringC& str) {
-  int32_t iLength = str.GetLength();
-  uint32_t uHash = FX_HashCode_String_GetW(str.c_str(), iLength, TRUE);
-  int32_t iStart = KEYWORD_START, iEnd = KEYWORD_END;
-  int32_t iMid = (iStart + iEnd) / 2;
+  uint32_t uHash = FX_HashCode_GetW(str, true);
+  int32_t iStart = KEYWORD_START;
+  int32_t iEnd = KEYWORD_END;
   XFA_FMKeyword keyword;
   do {
-    iMid = (iStart + iEnd) / 2;
+    int32_t iMid = (iStart + iEnd) / 2;
     keyword = keyWords[iMid];
     if (uHash == keyword.m_uHash) {
       return keyword.m_type;
     } else if (uHash < keyword.m_uHash) {
       iEnd = iMid - 1;
     } else {
       iStart = iMid + 1;
     }
   } while (iStart <= iEnd);
   return TOKidentifier;
 }
 
 void CXFA_FMLexer::Error(XFA_FM_ERRMSG msg, ...) {
   m_pErrorInfo->linenum = m_uCurrentLine;
   const FX_WCHAR* lpMessageInfo = XFA_FM_ErrorMsg(msg);
   va_list ap;
   va_start(ap, msg);
   m_pErrorInfo->message.FormatV(lpMessageInfo, ap);
   va_end(ap);
 }
 
 FX_BOOL CXFA_FMLexer::HasError() const {
   if (m_pErrorInfo->message.IsEmpty()) {
     return FALSE;
   }
   return TRUE;
 }