Move fx_safe_types.h to include/ directory.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//testing/test.gni")
 
 pdf_use_skia = false
 
 declare_args() {
   # On Android there's no system FreeType. On Windows and Mac, only a few
@@ skipping 497 matching lines @@
   ]
 }
 
 static_library("fxcrt") {
   sources = [
     "core/include/fxcrt/fx_arb.h",
     "core/include/fxcrt/fx_basic.h",
     "core/include/fxcrt/fx_coordinates.h",
     "core/include/fxcrt/fx_ext.h",
     "core/include/fxcrt/fx_memory.h",
+    "core/include/fxcrt/fx_safe_types.h",
     "core/include/fxcrt/fx_stream.h",
     "core/include/fxcrt/fx_string.h",
     "core/include/fxcrt/fx_system.h",
     "core/include/fxcrt/fx_ucd.h",
     "core/include/fxcrt/fx_xml.h",
     "core/src/fxcrt/extension.h",
     "core/src/fxcrt/fx_arabic.cpp",
     "core/src/fxcrt/fx_arabic.h",
     "core/src/fxcrt/fx_basic_array.cpp",
     "core/src/fxcrt/fx_basic_bstring.cpp",
     "core/src/fxcrt/fx_basic_buffer.cpp",
     "core/src/fxcrt/fx_basic_coords.cpp",
     "core/src/fxcrt/fx_basic_gcc.cpp",
     "core/src/fxcrt/fx_basic_list.cpp",
     "core/src/fxcrt/fx_basic_maps.cpp",
     "core/src/fxcrt/fx_basic_memmgr.cpp",
     "core/src/fxcrt/fx_basic_plex.cpp",
     "core/src/fxcrt/fx_basic_utf.cpp",
     "core/src/fxcrt/fx_basic_util.cpp",
     "core/src/fxcrt/fx_basic_wstring.cpp",
     "core/src/fxcrt/fx_extension.cpp",
-    "core/src/fxcrt/fx_safe_types.h",
     "core/src/fxcrt/fx_ucddata.cpp",
     "core/src/fxcrt/fx_unicode.cpp",
     "core/src/fxcrt/fx_xml_composer.cpp",
     "core/src/fxcrt/fx_xml_parser.cpp",
     "core/src/fxcrt/fxcrt_platforms.cpp",
     "core/src/fxcrt/fxcrt_platforms.h",
     "core/src/fxcrt/fxcrt_posix.cpp",
     "core/src/fxcrt/fxcrt_posix.h",
     "core/src/fxcrt/fxcrt_windows.cpp",
     "core/src/fxcrt/fxcrt_windows.h",
@@ skipping 350 matching lines @@
     "//v8",
     "//v8/include",
     "."
   ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
   ]
 }