Remove implicit cast from CFX_WideString to (const wchar_t*)

xfa/fgas/font/fgas_gefont.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/fgas/font/fgas_gefont.h"
 
 #include "xfa/fgas/crt/fgas_codepage.h"
 #include "xfa/fgas/font/fgas_fontutils.h"
@@ skipping 496 matching lines @@
           *ppFont = pFont;
         }
         return iGlyphIndex;
       }
     }
   }
   if (m_pFontMgr != NULL && bRecursive) {
     CFX_WideString wsFamily;
     GetFamilyName(wsFamily);
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
-    IFX_Font* pFont = m_pFontMgr->GetDefFontByUnicode(
-        wUnicode, GetFontStyles(), (const FX_WCHAR*)wsFamily);
+    IFX_Font* pFont = m_pFontMgr->GetDefFontByUnicode(wUnicode, GetFontStyles(),
+                                                      wsFamily.c_str());
 #else
     IFX_Font* pFont = m_pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(),
-                                                   (const FX_WCHAR*)wsFamily);
+                                                   wsFamily.c_str());
     if (NULL == pFont) {
       pFont = m_pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(), NULL);
     }
 #endif
     if (pFont != NULL) {
       if (pFont == (IFX_Font*)this) {
         pFont->Release();
         return 0xFFFF;
       }
       m_FontMapper.SetAt((void*)(uintptr_t)wUnicode, (void*)pFont);
@@ skipping 32 matching lines @@
   }
   if (m_pRectArray != NULL) {
     m_pRectArray->RemoveAll();
   }
 }
 IFX_Font* CFX_GEFont::GetSubstFont(int32_t iGlyphIndex) const {
   iGlyphIndex = ((uint32_t)iGlyphIndex) >> 24;
   return iGlyphIndex == 0 ? (IFX_Font*)this
                           : (IFX_Font*)m_SubstFonts[iGlyphIndex - 1];
 }