Introduce ChromeStabilityMetricsProvider

chrome/browser/metrics/chrome_stability_metrics_provider.h

+// 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.
+
+#ifndef CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
+#define CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
+
+#include "base/basictypes.h"
+#include "base/metrics/user_metrics.h"
+#include "base/process/kill.h"
+#include "components/metrics/metrics_provider.h"
+#include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+namespace content {
+class RenderProcessHost;
+class WebContents;
+}
+
+// ChromeStabilityMetricsProvider gathers and logs Chrome-specific stability-
+// related metrics.
+class ChromeStabilityMetricsProvider : public metrics::MetricsProvider,
+                                       public content::NotificationObserver {
+ public:
+  ChromeStabilityMetricsProvider();
+  virtual ~ChromeStabilityMetricsProvider();
+
+  // metrics::MetricsDataProvider:
+  virtual void OnRecordingEnabled() OVERRIDE;
+  virtual void OnRecordingDisabled() OVERRIDE;
+  virtual void ProvideStabilityMetrics(
+      metrics::SystemProfileProto_Stability* stability_proto) OVERRIDE;
+
+ private:
+  // content::NotificationObserver:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  // Logs the initiation of a page load and uses |web_contents| to do
+  // additional logging of the type of page loaded.
+  void LogLoadStarted(content::WebContents* web_contents);
+
+  // Records a renderer process crash.
+  void LogRendererCrash(content::RenderProcessHost* host,
+                        base::TerminationStatus status,
+                        int exit_code);
+
+  // Records a renderer process hang.
+  void LogRendererHang();
+
+  // Registrar for receiving stability-related notifications.
+  content::NotificationRegistrar registrar_;
+
+  // TODO(blundell): Is this needed?

[Alexei Svitkine (slow), 2014/05/21 15:02:29]

I don't think it is in this case.

[blundell, 2014/05/21 15:14:17]

Done.

+  // Saved cache of generated Stability event protos, to be copied into the UMA
+  // proto when ProvideGeneralMetrics() is called.
+  metrics::ChromeUserMetricsExtension omnibox_events_cache;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeStabilityMetricsProvider);
+};
+
+#endif  // CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_