Create a histogram serialization mechanism in components/metrics

base/metrics/crash_sample.h

Index: base/metrics/crash_sample.h
diff --git a/base/metrics/crash_sample.h b/base/metrics/crash_sample.h
new file mode 100644
index 0000000000000000000000000000000000000000..6bcc4120e9def34ff70eb5aa9d9142efd7c71ed0
--- /dev/null
+++ b/base/metrics/crash_sample.h
@@ -0,0 +1,26 @@
+// 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_CRASH_SAMPLE_H
+# define BASE_METRICS_CHROMEOS_CRASH_SAMPLE_H
+
+#include <string>
+
+#include "base/base_export.h"
+#include "base/metrics/metric_sample.h"
+
+namespace base {
+class BASE_EXPORT CrashSample: public MetricSample {
+ public:
+  explicit CrashSample(const std::string& crashname);
+  ~CrashSample();
+  std::string name();
+  int Write(int buffer_size, char* buffer);
+  // static
+  static CrashSample* ReadCrash(const std::string& crash);
+ protected:
+  std::string name_;
+};
+}  // namespace base
+# endif  // BASE_METRICS_CHROMEOS_CRASH_SAMPLE_H