Create a histogram serialization mechanism in components/metrics

components/metrics/chromeos/crash_sample.cc

+// Copyright 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.
+
+#include "components/metrics/chromeos/crash_sample.h"
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/stringprintf.h"
+#include "components/metrics/chromeos/metric_sample.h"
+
+namespace metrics {
+
+CrashSample::CrashSample(const std::string& crashname)
+    : MetricSample(MetricSample::CRASH, crashname) {}
+
+CrashSample::~CrashSample() {}
+
+std::string CrashSample::ToString() const {
+  return base::StringPrintf("crash%c%s%c", '\0', name().c_str(), '\0');
+}
+
+// static
+scoped_ptr<CrashSample> CrashSample::ReadCrash(const std::string& crashname) {
+  return scoped_ptr<CrashSample>(new CrashSample(crashname));
+}
+
+}  // namespace metrics