Create a histogram serialization mechanism in components/metrics

base/metrics/useraction_sample.h

Index: base/metrics/useraction_sample.h
diff --git a/base/metrics/useraction_sample.h b/base/metrics/useraction_sample.h
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index 0000000000000000000000000000000000000000..b99e689e1c6c32a3b706de50aa85398c64c51c63
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+++ b/base/metrics/useraction_sample.h
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+// Copyright (c) 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.
+
+# ifndef BASE_METRICS_CHROMEOS_USERACTION_SAMPLE_H
+# define BASE_METRICS_CHROMEOS_USERACTION_SAMPLE_H
+
+#include <string>
+
+#include "base/base_export.h"
+

[achaulk, 2014/04/07 22:16:00]

No spacing here

+#include "base/metrics/metric_sample.h"
+
+namespace base {
+class BASE_EXPORT UserActionSample: public MetricSample {
+ public:
+  explicit UserActionSample(const std::string& action);
+  virtual ~UserActionSample();
+  std::string getAction();
+  int Write(int buffer_size, char* buffer);
+  // static
+  static UserActionSample* ReadUserAction(const std::string& message);
+ private:
+  std::string action;
+};
+}  // namespace base
+# endif  // BASE_METRICS_CHROMEOS_USERACTION_SAMPLE_H