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

components/metrics/leak_detector/leak_detector_impl_unittest.cc

 // 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.
 
 #include "components/metrics/leak_detector/leak_detector_impl.h"
 
 #include <math.h>
+#include <stddef.h>
 #include <stdint.h>
 
 #include <complex>
 #include <new>
 #include <set>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/metrics/leak_detector/custom_allocator.h"
@@ skipping 437 matching lines @@
         kStack4.stack[i] <= kMappingAddr + kMappingSize) {
       EXPECT_EQ(kStack4.stack[i] - kMappingAddr, report2.call_stack()[i]);
     } else {
       EXPECT_EQ(kStack4.stack[i], report2.call_stack()[i]);
     }
   }
 }
 
 }  // namespace leak_detector
 }  // namespace metrics