Switch to standard integer types in extensions/.

extensions/common/manifest_handler_unittest.cc

 // Copyright (c) 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 <stddef.h>
+
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_builder.h"
 #include "extensions/common/install_warning.h"
@@ skipping 252 matching lines @@
   EXPECT_TRUE(
       ManifestHandler::ValidateExtension(extension.get(), &error, &warnings));
 
   // Validates "a" and fails.
   (new TestManifestValidator(false, true, SingleKey("a")))->Register();
   EXPECT_FALSE(
       ManifestHandler::ValidateExtension(extension.get(), &error, &warnings));
 }
 
 }  // namespace extensions