Index: base/metrics/histogram_base.h |
=================================================================== |
--- base/metrics/histogram_base.h (revision 221170) |
+++ base/metrics/histogram_base.h (working copy) |
@@ -7,6 +7,7 @@ |
#include <string> |
+#include "base/atomicops.h" |
#include "base/base_export.h" |
#include "base/basictypes.h" |
#include "base/memory/scoped_ptr.h" |
@@ -50,8 +51,8 @@ |
class BASE_EXPORT HistogramBase { |
public: |
- typedef int Sample; // Used for samples. |
- typedef int Count; // Used to count samples. |
+ typedef int Sample; // Used for samples. |
+ typedef subtle::Atomic32 Count; // Used to count samples. |
static const Sample kSampleType_MAX; // INT_MAX |