Make a few more const tables smaller.

xfa/fxfa/app/xfa_ffwidget.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/app/xfa_ffwidget.h"
 
 #include <algorithm>
 
@@ skipping 886 matching lines @@
                ((FX_DWORD)g_inv_base64[pBuffer[i + 3]]);
       pOutBuffer[j] = (uint8_t)(dwLimb >> 16) & 0xff;
       pOutBuffer[j + 1] = (uint8_t)(dwLimb >> 8) & 0xff;
       pOutBuffer[j + 2] = (uint8_t)(dwLimb)&0xff;
       j += 3;
     }
   }
   FX_Free(pBuffer);
   return j;
 }
-static FX_CHAR g_base64_chars[] =
+
+static const FX_CHAR g_base64_chars[] =
     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
 FX_CHAR* XFA_Base64Encode(const uint8_t* buf, int32_t buf_len) {
   FX_CHAR* out = NULL;
   int i, j;
   FX_DWORD limb;
   out = FX_Alloc(FX_CHAR, ((buf_len * 8 + 5) / 6) + 5);
   for (i = 0, j = 0, limb = 0; i + 2 < buf_len; i += 3, j += 4) {
     limb = ((FX_DWORD)buf[i] << 16) | ((FX_DWORD)buf[i + 1] << 8) |
            ((FX_DWORD)buf[i + 2]);
     out[j] = g_base64_chars[(limb >> 18) & 63];
     out[j + 1] = g_base64_chars[(limb >> 12) & 63];
@@ skipping 1035 matching lines @@
       iType != XFA_ELEMENT_Rectangle) {
     return;
   }
   CXFA_StrokeArray strokes;
   if (!(dwFlags & XFA_DRAWBOX_ForceRound) && iType != XFA_ELEMENT_Arc) {
     box.GetStrokes(strokes);
   }
   XFA_BOX_Fill(box, strokes, pGS, rtWidget, pMatrix, dwFlags);
   XFA_BOX_Stroke(box, strokes, pGS, rtWidget, pMatrix, dwFlags);
 }