Switch to standard integer types in mojo/.

mojo/edk/system/core_test_base.h

 // 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.
 
 #ifndef MOJO_EDK_SYSTEM_CORE_TEST_BASE_H_
 #define MOJO_EDK_SYSTEM_CORE_TEST_BASE_H_
 
+#include <stddef.h>
+
 #include "base/synchronization/lock.h"
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/system/test_utils.h"
 #include "mojo/public/c/system/types.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace edk {
 
@@ skipping 85 matching lines @@
   std::vector<Awakable*> added_awakables_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(CoreTestBase_MockHandleInfo);
 };
 
 }  // namespace test
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_CORE_TEST_BASE_H_