[Metrics] Move non-idle notifications from MetricsService to ChromeMetricsServiceClient

chrome/browser/metrics/metrics_service.h

Index: chrome/browser/metrics/metrics_service.h
diff --git a/chrome/browser/metrics/metrics_service.h b/chrome/browser/metrics/metrics_service.h
index 858ec4fd44c12bc1f41742bc75a42ee891ba6437..91f8b1bc6ab13d81f1b322ac48928172a67ce3f9 100644
--- a/chrome/browser/metrics/metrics_service.h
+++ b/chrome/browser/metrics/metrics_service.h
@@ -211,6 +211,10 @@ class MetricsService
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // This should be called when the application is not idle, i.e. the user seems
+  // to be interacting with the application.
+  void OnApplicationNotIdle();
+
   // Invoked when we get a WM_SESSIONEND. This places a value in prefs that is
   // reset when RecordCompletedSessionEnd is invoked.
   void RecordStartOfSessionEnd();