Metrics provider for statistical stack profiler

components/metrics/call_stack_profile_metrics_provider.h

+// Copyright 2015 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 COMPONENTS_METRICS_CALL_STACK_PROFILE_METRICS_PROVIDER_H_
+#define COMPONENTS_METRICS_CALL_STACK_PROFILE_METRICS_PROVIDER_H_
+
+#include <vector>
+
+#include "base/profiler/stack_sampling_profiler.h"
+#include "components/metrics/metrics_provider.h"
+
+namespace metrics {
+class ChromeUserMetricsExtension;
+
+// Performs metrics logging for the stack sampling profiler.
+class CallStackProfileMetricsProvider : public metrics::MetricsProvider {
+ public:
+  CallStackProfileMetricsProvider();
+  ~CallStackProfileMetricsProvider() override;
+
+  // metrics::MetricsProvider:
+  void ProvideGeneralMetrics(
+      metrics::ChromeUserMetricsExtension* uma_proto) override;
+
+  // Uses |profiles| as the source data for the next invocation of
+  // ProvideGeneralMetrics, rather than sourcing them from the
+  // StackSamplingProfiler.
+  void SetSourceProfilesForTesting(
+      const std::vector<base::StackSamplingProfiler::Profile>& profiles);
+
+ private:
+  std::vector<base::StackSamplingProfiler::Profile> source_profiles_for_test_;
+
+  DISALLOW_COPY_AND_ASSIGN(CallStackProfileMetricsProvider);
+};
+
+}  // namespace metrics
+
+#endif  // COMPONENTS_METRICS_CALL_STACK_PROFILE_METRICS_PROVIDER_H_