Chromecast: adds handler to log metrics from external processes.

chromecast/browser/metrics/cast_stability_metrics_provider.h

Index: chromecast/browser/metrics/cast_stability_metrics_provider.h
diff --git a/chromecast/browser/metrics/cast_stability_metrics_provider.h b/chromecast/browser/metrics/cast_stability_metrics_provider.h
index 635fc068edafe9e656083be6936f8982ed904c9a..eea85054057cdf8c66afbb81874029a705892d6a 100644
--- a/chromecast/browser/metrics/cast_stability_metrics_provider.h
+++ b/chromecast/browser/metrics/cast_stability_metrics_provider.h
@@ -13,7 +13,6 @@
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
-class MetricsService;
 class PrefRegistrySimple;
 
 namespace content {
@@ -21,6 +20,10 @@ class RenderProcessHost;
 class WebContents;
 }
 
+namespace metrics {
+class MetricsService;
+}
+
 namespace chromecast {
 namespace metrics {
 
@@ -34,7 +37,8 @@ class CastStabilityMetricsProvider
   // Registers local state prefs used by this class.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
-  CastStabilityMetricsProvider();
+  explicit CastStabilityMetricsProvider(
+      ::metrics::MetricsService* metrics_service);
   virtual ~CastStabilityMetricsProvider();
 
   // metrics::MetricsDataProvider implementation:
@@ -43,6 +47,9 @@ class CastStabilityMetricsProvider
   virtual void ProvideStabilityMetrics(
       ::metrics::SystemProfileProto* system_profile_proto) override;
 
+  // Logs an external crash, presumably from the ExternalMetrics service.
+  void LogExternalCrash(const std::string& crash_type);
+
  private:
   // content::NotificationObserver implementation:
   virtual void Observe(int type,
@@ -64,6 +71,11 @@ class CastStabilityMetricsProvider
   // Registrar for receiving stability-related notifications.
   content::NotificationRegistrar registrar_;
 
+  // Reference to the current MetricsService. Raw pointer is safe, since
+  // MetricsService is responsible for the lifetime of
+  // CastStabilityMetricsProvider.
+  ::metrics::MetricsService* metrics_service_;
+
   DISALLOW_COPY_AND_ASSIGN(CastStabilityMetricsProvider);
 };