Create a histogram serialization mechanism in components/metrics

base/metrics/crash_sample.cc

+// 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.
+
+#include "base/metrics/crash_sample.h"
+
+#include <string>
+
+#include "base/metrics/chromeos_metrics.h"
+#include "base/metrics/metric_sample.h"
+
+using std::string;
+
+namespace base {
+CrashSample::CrashSample(const std::string& crashname):
+  MetricSample(MetricSample::CRASH) {
+  name_ = crashname;
+}
+
+std::string CrashSample::name() {
+  return name_;
+}
+
+CrashSample* CrashSample::ReadCrash(const std::string& crashname) {
+  return new CrashSample(crashname);
+}
+
+CrashSample::~CrashSample() {}
+
+int CrashSample::Write(int buffer_size, char* buffer) {
+  return ChromeOSMetrics::FormatSample(buffer_size, buffer,
+                              "crash%c%s", '\0', name_.c_str());
+}
+}  // namespace base