Switch to standard integer types in win8/.

win8/metro_driver/file_picker_ash.cc

Index: win8/metro_driver/file_picker_ash.cc
diff --git a/win8/metro_driver/file_picker_ash.cc b/win8/metro_driver/file_picker_ash.cc
index a420b53a44068faa20258247564c8854ad11ca43..8cafb73524df9c9a2599d4e80783a456d6057b03 100644
--- a/win8/metro_driver/file_picker_ash.cc
+++ b/win8/metro_driver/file_picker_ash.cc
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <stddef.h>
+#include <stdint.h>
+
 #include "stdafx.h"
 #include "win8/metro_driver/file_picker_ash.h"
 
@@ -459,7 +462,7 @@ HRESULT SaveFilePickerSession::StartFilePicker() {
 
   // The save picker requires at least one choice.  Callers are strongly advised
   // to provide sensible choices.  If none were given, fallback to .dat.
-  uint32 num_choices = 0;
+  uint32_t num_choices = 0;
   hr = choices->get_Size(&num_choices);
   if (FAILED(hr))
     return hr;