Let MetricsService know about some Android Activities

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index eece5eb62a8a99984546ae59c251e176d5383896..abbd410ec89cf0aabeee3bb2fac3c47dc0afa55a 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1493,6 +1493,29 @@ const char kStabilityKernelCrashCount[] =
 const char kStabilitySystemUncleanShutdownCount[] =
     "user_experience_metrics.stability.system_unclean_shutdowns";
 
+#if defined(OS_ANDROID)
+// Activity type that is currently in the foreground for the UMA session.
+// Uses the ActivityTypeIds::Type enum.
+const char kStabilityForegroundActivityType[] =
+    "user_experience_metrics.stability.current_foreground_activity_type";
+
+// Tracks which Activities were launched during the last session.
+// See |metrics_service_android.cc| for its usage.
+const char kStabilityLaunchedActivityFlags[] =
+    "user_experience_metrics.stability.launched_activity_flags";
+
+// List pref: Counts how many times each Activity was launched.
+// Indexed into by ActivityTypeIds::Type.
+const char kStabilityLaunchedActivityCounts[] =
+    "user_experience_metrics.stability.launched_activity_counts";
+
+// List pref: Counts how many times each Activity type was in the foreground
+// when a UMA session failed to be shut down properly.
+// Indexed into by ActivityTypeIds::Type.
+const char kStabilityCrashedActivityCounts[] =
+    "user_experience_metrics.stability.crashed_activity_counts";
+#endif
+
 // Number of times the browser has been able to register crash reporting.
 const char kStabilityBreakpadRegistrationSuccess[] =
     "user_experience_metrics.stability.breakpad_registration_ok";