Delegate PersistedLogs metrics recording

components/metrics/persisted_logs_metrics.h

Index: components/metrics/persisted_logs_metrics.h
diff --git a/components/metrics/persisted_logs_metrics.h b/components/metrics/persisted_logs_metrics.h
new file mode 100644
index 0000000000000000000000000000000000000000..b761cb4d9001f240c8a6a0058207f9a3a36f7fb7
--- /dev/null
+++ b/components/metrics/persisted_logs_metrics.h
@@ -0,0 +1,35 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.

[rkaplow, 2016/12/19 21:44:33]

nit 2016

[Steven Holte, 2016/12/19 21:53:12]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_METRICS_PERSISTED_LOGS_METRICS_H_
+#define COMPONENTS_METRICS_PERSISTED_LOGS_METRICS_H_
+
+#include "base/macros.h"
+#include "components/metrics/persisted_logs.h"
+
+namespace metrics {
+
+// Maintains a list of unsent logs that are written and restored from disk.

[rkaplow, 2016/12/19 21:44:33]

fix comment

[Steven Holte, 2016/12/19 21:53:12]

Done.

[rkaplow, 2016/12/19 21:55:09]

Did the impl but missed the base here

+class PersistedLogsMetrics {
+ public:
+  PersistedLogsMetrics() {}
+  ~PersistedLogsMetrics() {}
+
+  virtual PersistedLogs::LogReadStatus RecordLogReadStatus(
+      PersistedLogs::LogReadStatus status) = 0;
+
+  virtual void RecordCompressionRatio(
+    size_t compressed_size, size_t original_size) {}
+
+  virtual void RecordDroppedLogSize(size_t size) {}
+
+  virtual void RecordDroppedLogsNum(int dropped_logs_num) {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PersistedLogsMetrics);
+};
+
+}  // namespace metrics
+
+#endif  // COMPONENTS_METRICS_PERSISTED_LOGS_METRICS_H_