Switch to standard integer types in ppapi/.

ppapi/shared_impl/file_ref_util.cc

 // Copyright 2013 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/shared_impl/file_ref_util.h"
 
+#include <stddef.h>
+
 #include "base/files/file_path.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "build/build_config.h"
 
 namespace ppapi {
 
 std::string GetNameForInternalFilePath(const std::string& path) {
   if (path == "/")
     return path;
   size_t pos = path.rfind('/');
   CHECK(pos != std::string::npos);
   return path.substr(pos + 1);
 }
@@ skipping 27 matching lines @@
 bool IsValidExternalPath(const base::FilePath& path) {
   return !path.empty() && !path.ReferencesParent();
 }
 
 void NormalizeInternalPath(std::string* path) {
   if (path->size() > 1 && path->at(path->size() - 1) == '/')
     path->erase(path->size() - 1, 1);
 }
 
 }  // namespace ppapi