Move fx_safe_types.h to include/ directory.

core/src/fxcrt/fx_safe_types.h

Index: core/src/fxcrt/fx_safe_types.h
diff --git a/core/src/fxcrt/fx_safe_types.h b/core/src/fxcrt/fx_safe_types.h
deleted file mode 100644
index 35a906cf27581d25468771da13743f143872ac7f..0000000000000000000000000000000000000000
--- a/core/src/fxcrt/fx_safe_types.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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.
-
-#ifndef CORE_SRC_FXCRT_FX_SAFE_TYPES_H_
-#define CORE_SRC_FXCRT_FX_SAFE_TYPES_H_
-
-#include <stdlib.h>  // For size_t.
-
-#include "../../../third_party/base/numerics/safe_math.h"
-
-typedef pdfium::base::CheckedNumeric<FX_DWORD> FX_SAFE_DWORD;
-typedef pdfium::base::CheckedNumeric<FX_INT32> FX_SAFE_INT32;
-typedef pdfium::base::CheckedNumeric<size_t> FX_SAFE_SIZE_T;
-typedef pdfium::base::CheckedNumeric<FX_FILESIZE> FX_SAFE_FILESIZE;
-
-#endif  // CORE_SRC_FXCRT_FX_SAFE_TYPES_H_