metrics: Send ability to notify chrome of system crashes

Change-Id: I11df903c020141a8123055620f9ad23fedc06c7d

BUG=9352
TEST=
1) UserCrash
2) Crash random process and verify Chrome indicates "other user" crashes
occurred in its stability UMA data.

Review URL: http://codereview.chromium.org/6211001
diff --git a/metrics/metrics_library.h b/metrics/metrics_library.h
index ed83862..3f860eb 100644
--- a/metrics/metrics_library.h
+++ b/metrics/metrics_library.h
@@ -82,6 +82,10 @@
   // |action| is the user-generated event (e.g., "MuteKeyPressed").
   bool SendUserActionToUMA(const std::string& action);
 
+  // Sends a signal to UMA that a crash of the given |crash_kind|
+  // has occurred.  Used by UMA to generate stability statistics.
+  bool SendCrashToUMA(const char *crash_kind);
+
   // Sends to Autotest and returns true on success.
   static bool SendToAutotest(const std::string& name, int value);