Browser watcher part three.

components/browser_watcher/watcher_metrics_provider_win.h

+// 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.
+
+#ifndef COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
+#define COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
+
+#include "base/macros.h"
+#include "base/strings/string16.h"
+#include "components/metrics/metrics_provider.h"
+
+namespace browser_watcher {
+
+// Provides stability data captured by the Chrome Watcher, namely the browser
+// process exit codes.
+class WatcherMetricsProviderWin : public metrics::MetricsProvider {
+ public:
+  static const char kBrowserExitCodeHistogramName[];
+
+  explicit WatcherMetricsProviderWin(const base::char16* registry_path);
+  ~WatcherMetricsProviderWin();
+
+  // metrics::MetricsProvider implementation.
+  virtual void ProvideStabilityMetrics(
+      metrics::SystemProfileProto* system_profile_proto) override;
+
+ private:
+  base::string16 registry_path_;
+
+  DISALLOW_COPY_AND_ASSIGN(WatcherMetricsProviderWin);
+};
+
+}  // namespace browser_watcher
+
+#endif  // COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_