Add namespace and re-arrange PDFium's local copy of chromium /base.

core/src/fxcrt/fx_basic_wstring.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 "../../include/fxcrt/fx_basic.h"
-#include "../../../third_party/numerics/safe_math.h"
+#include "../../../third_party/base/numerics/safe_math.h"
 
 static CFX_StringDataW* FX_AllocStringW(int nLen)
 {
     if (nLen == 0 || nLen < 0) {
         return NULL;
     }
 
-    base::CheckedNumeric<int> iSize = static_cast<int>(sizeof(FX_WCHAR));
+    pdfium::base::CheckedNumeric<int> iSize = static_cast<int>(sizeof(FX_WCHAR));
     iSize *= nLen + 1;
     iSize += sizeof(long) * 3;
     CFX_StringDataW* pData = (CFX_StringDataW*)FX_Alloc(FX_BYTE, iSize.ValueOrDie());
     if (!pData) {
         return NULL;
     }
 
     // TODO(palmer): |nLen| should really be declared as |size_t|, but for
     // now I just want to fix the overflow without changing any interfaces.
     // Declaring |nLen| as |size_t| will also simplify the above code
@@ skipping 401 matching lines @@
 
 
 
 void CFX_WideString::AllocCopy(CFX_WideString& dest, FX_STRSIZE nCopyLen, FX_STRSIZE nCopyIndex) const
 {
     // |FX_STRSIZE| is currently typedef'd as in |int|. TODO(palmer): It
     // should be a |size_t|, or at least unsigned.
     if (nCopyLen == 0 || nCopyLen < 0) {
         return;
     }
-    base::CheckedNumeric<FX_STRSIZE> iSize = static_cast<FX_STRSIZE>(sizeof(FX_WCHAR));
+    pdfium::base::CheckedNumeric<FX_STRSIZE> iSize = static_cast<FX_STRSIZE>(sizeof(FX_WCHAR));
     iSize *= nCopyLen;
     ASSERT(dest.m_pData == NULL);
     dest.m_pData = FX_AllocStringW(nCopyLen);
     if (dest.m_pData) {
         FXSYS_memcpy32(dest.m_pData->m_String, m_pData->m_String + nCopyIndex, iSize.ValueOrDie());
     }
 }
 CFX_WideString CFX_WideString::Left(FX_STRSIZE nCount) const
 {
     if (m_pData == NULL) {
@@ skipping 667 matching lines @@
             return (CFX_CharMap*)&g_DefaultJISMapper;
         case 936:
             return (CFX_CharMap*)&g_DefaultGBKMapper;
         case 949:
             return (CFX_CharMap*)&g_DefaultUHCMapper;
         case 950:
             return (CFX_CharMap*)&g_DefaultBig5Mapper;
     }
     return NULL;
 }