Create a histogram serialization mechanism in components/metrics

components/metrics/export/metric_sample.cc

Index: components/metrics/export/metric_sample.cc
diff --git a/components/metrics/export/metric_sample.cc b/components/metrics/export/metric_sample.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b9331787754539c11ca106c963c410bb4d39afde
--- /dev/null
+++ b/components/metrics/export/metric_sample.cc
@@ -0,0 +1,25 @@
+// 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/export/metric_sample.h"
+
+#include <string>
+
+using std::string;
+
+namespace metrics {

[Alexei Svitkine (slow), 2014/04/30 15:25:24]

Nit: Add a blank line after this.

[bsimonnet, 2014/04/30 20:28:40]

Done.

+MetricSample::MetricSample(MetricSample::SampleType sample_type,
+                           const string& metric_name)
+    : type_(sample_type), name_(metric_name) {}
+
+MetricSample::~MetricSample() {}
+
+bool MetricSample::IsValid() const {
+  return name().find(' ') == string::npos &&
+         name().find('\0') == string::npos && name().length() > 0;
+}
+
+string MetricSample::ToString() const { return "not implemented"; }

[Alexei Svitkine (slow), 2014/04/30 15:25:24]

Put method body on separate line.

[bsimonnet, 2014/04/30 20:28:40]

Done.

+
+}  // namespace metrics