Switch to standard integer types in components/, part 2 of 4.

components/metrics/leak_detector/leak_detector_impl.h

 // Copyright 2015 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 COMPONENTS_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_IMPL_H_
 #define COMPONENTS_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_IMPL_H_
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "components/metrics/leak_detector/call_stack_manager.h"
 #include "components/metrics/leak_detector/custom_allocator.h"
 #include "components/metrics/leak_detector/leak_analyzer.h"
 
@@ skipping 135 matching lines @@
   // considered a leak suspect.
   int call_stack_suspicion_threshold_;
 
   DISALLOW_COPY_AND_ASSIGN(LeakDetectorImpl);
 };
 
 }  // namespace leak_detector
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_IMPL_H_