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 8c3e946366f9313f5c3c735b041c58231b48a650..c069f1dd951077686da0e3f700252177ab52a572 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -477,6 +477,12 @@ 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[];