components/browser_watcher/watcher_metrics_provider_win.h

   1 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
   6 #define COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
   7
   8 #include "base/macros.h"
   9 #include "base/strings/string16.h"
  10 #include "components/metrics/metrics_provider.h"
  11
  12 namespace browser_watcher {
  13
  14 // Provides stability data captured by the Chrome Watcher, namely the browser
  15 // process exit codes, as well as exit funnel metrics.
  16 // The exit funnel records a trace of named, timed events in registry per
  17 // process. For reporting, the trace is recorded as a sequence of events
  18 // named Stability.ExitFunnel.<eventname>, associated to the time
  19 // (in milliseconds) from first event in a trace. For a normal process exit,
  20 // the sequence might look like this:
  21 // - Stability.ExitFunnel.Logoff: 0
  22 // - Stability.ExitFunnel.NotifyShutdown: 10
  23 // - Stability.ExitFunnel.EndSession: 20
  24 // - Stability.ExitFunnel.KillProcess: 30
  25 class WatcherMetricsProviderWin : public metrics::MetricsProvider {
  26  public:
  27   static const char kBrowserExitCodeHistogramName[];
  28   static const char kExitFunnelHistogramPrefix[];
  29
  30   explicit WatcherMetricsProviderWin(const base::char16* registry_path);
  31   ~WatcherMetricsProviderWin();
  32
  33   // metrics::MetricsProvider implementation.
  34   virtual void ProvideStabilityMetrics(
  35       metrics::SystemProfileProto* system_profile_proto) override;
  36
  37  private:
  38   base::string16 registry_path_;
  39
  40   DISALLOW_COPY_AND_ASSIGN(WatcherMetricsProviderWin);
  41 };
  42
  43 }  // namespace browser_watcher
  44
  45 #endif  // COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_