Let MetricsService know about some Android Activities

chrome/common/pref_names.h

Index: chrome/common/pref_names.h
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 98fd99f36a248e810eaeefd6901d714e5ec07fb4..33bad73436ff27847123f3c672e0d08cb481b34d 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -475,6 +475,12 @@ extern const char kStabilityChildProcessCrashCount[];
 extern const char kStabilityOtherUserCrashCount[];
 extern const char kStabilityKernelCrashCount[];
 extern const char kStabilitySystemUncleanShutdownCount[];
+#if defined(OS_ANDROID)
+extern const char kStabilityForegroundActivityType[];
+extern const char kStabilityLaunchedActivityFlags[];
+extern const char kStabilityLaunchedActivityCounts[];
+extern const char kStabilityCrashedActivityCounts[];
+#endif
 
 extern const char kStabilityBreakpadRegistrationSuccess[];
 extern const char kStabilityBreakpadRegistrationFail[];