Let MetricsService know about some Android Activities

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 0e9e0545faa06b80d5b08a1e9ec5b6343e0c845e..de386dab7109256258e285c5d8564a6f383d3f65 100644
--- a/chrome/browser/metrics/metrics_service.h
+++ b/chrome/browser/metrics/metrics_service.h
@@ -29,7 +29,9 @@
 #include "content/public/browser/user_metrics.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
-#if defined(OS_CHROMEOS)
+#if defined(OS_ANDROID)
+#include "chrome/browser/android/activity_type_ids.h"
+#elif defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/external_metrics.h"
 #endif
 
@@ -190,6 +192,14 @@ class MetricsService
   // that session end was successful.
   void RecordCompletedSessionEnd();
 
+#if defined(OS_ANDROID)
+  // Called to record histograms.
+  void RecordAndroidStabilityHistograms();
+
+  // Called when the Activity that the user interacts with is swapped out.
+  void OnForegroundActivityChanged(ActivityTypeIds::Type type);
+#endif  // defined(OS_ANDROID)
+
 #if defined(OS_ANDROID) || defined(OS_IOS)
   // Called when the application is going into background mode.
   void OnAppEnterBackground();