Fixes for re-enabling more MSVC level 4 warnings: pdfium/ edition (try 2)

core/include/fxcrt/fx_ucd.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 _FX_UNICODE_
 #define _FX_UNICODE_
 enum FX_CHARBREAKPROP {
     FX_CBP_OP = 0,
@@ skipping 70 matching lines @@
     FX_CHARTYPE_Combination                     = (4 << FX_CHARTYPEBITS),
     FX_CHARTYPE_Numeric                         = (5 << FX_CHARTYPEBITS),
     FX_CHARTYPE_Normal                          = (6 << FX_CHARTYPEBITS),
     FX_CHARTYPE_ArabicAlef                      = (7 << FX_CHARTYPEBITS),
     FX_CHARTYPE_ArabicSpecial           = (8 << FX_CHARTYPEBITS),
     FX_CHARTYPE_ArabicDistortion        = (9 << FX_CHARTYPEBITS),
     FX_CHARTYPE_ArabicNormal            = (10 << FX_CHARTYPEBITS),
     FX_CHARTYPE_ArabicForm                      = (11 << FX_CHARTYPEBITS),
     FX_CHARTYPE_Arabic                          = (12 << FX_CHARTYPEBITS),
 };
-typedef struct _FX_CHARPROPERTIES {
-    union {
-        struct {
-            FX_DWORD    dwBreakType             : 6;
-            FX_DWORD    dwBidiClass             : 5;
-            FX_DWORD    dwCharType              : 4;
-            FX_DWORD    dwRotation              : 1;
-            FX_DWORD    dwCJKSpecial    : 1;
-            FX_DWORD    dwVertIndex             : 6;
-            FX_DWORD    dwBidiIndex             : 9;
-        };
-        FX_DWORD        dwCharProps;
-    };
-} FX_CHARPROPERTIES;
 FX_DWORD FX_GetUnicodeProperties(FX_WCHAR wch);
 FX_BOOL FX_IsCtrlCode(FX_WCHAR ch);
 FX_BOOL FX_IsRotationCode(FX_WCHAR ch);
 FX_BOOL FX_IsCombinationChar(FX_WCHAR wch);
 FX_BOOL FX_IsBidiChar(FX_WCHAR wch);
 FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, FX_BOOL bRTL, FX_BOOL bVertical);
 FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, FX_DWORD dwProps, FX_BOOL bRTL, FX_BOOL bVertical);
 #endif