Metrics provider for statistical stack profiler

chrome/browser/metrics/chrome_metrics_service_client.h

Index: chrome/browser/metrics/chrome_metrics_service_client.h
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.h b/chrome/browser/metrics/chrome_metrics_service_client.h
index 2b95742b3cf670e477beb56ce1e19e3579884cbb..dc979db51c998736507381783326e45aefca65c2 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.h
+++ b/chrome/browser/metrics/chrome_metrics_service_client.h
@@ -19,6 +19,7 @@
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
+class CallStackProfileMetricsProvider;
 class ChromeOSMetricsProvider;
 class GoogleUpdateMetricsProviderWin;
 class PluginMetricsProvider;
@@ -164,6 +165,11 @@ class ChromeMetricsServiceClient
   GoogleUpdateMetricsProviderWin* google_update_metrics_provider_;
 #endif
 
+  // The CallStackProfileMetricsProvider instance that was registered with
+  // MetricsService. Has the same lifetime as |metrics_service_|. This is
+  // Windows x64-only until implemented for other platforms.
+  CallStackProfileMetricsProvider* call_stack_profile_metrics_provider_;
+
   // Callback that is called when initial metrics gathering is complete.
   base::Closure finished_gathering_initial_metrics_callback_;