Switch to standard integer types in mojo/.

mojo/edk/system/message_pipe_perftest.cc

 // Copyright 2014 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 <stdint.h>
+
 #include <utility>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/perf_time_logger.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/system/handle_signals_state.h"
 #include "mojo/edk/system/message_pipe_test_utils.h"
@@ skipping 134 matching lines @@
     Measure(mp.get().value());
   }
 
   SendQuitMessage(mp.get().value());
   EXPECT_EQ(0, helper()->WaitForChildShutdown());
 }
 
 }  // namespace
 }  // namespace edk
 }  // namespace mojo