Switch to standard integer types in ppapi/.

ppapi/tests/test_var.cc

 // Copyright (c) 2011 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.
 
 #include "ppapi/tests/test_var.h"
 
+#include <stdint.h>
 #include <string.h>
 
 #include <limits>
 
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/var.h"
 #include "ppapi/tests/testing_instance.h"
@@ skipping 225 matching lines @@
   if (length != 0) {
     return "Expected 0 on string conversion from Double var.";
   }
   if (result != NULL) {
     return "Expected NULL on string conversion from Double var.";
   }
 
   PASS();
 }