Factoring GUID generation from metrics to base

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 650935aaecd5599ea2c86ff91058b7dc41a7a03d..f1cfbb2a263ef081a9923decbd8d7d1036dac858 100644
--- a/chrome/browser/metrics/metrics_service.h
+++ b/chrome/browser/metrics/metrics_service.h
@@ -192,12 +192,6 @@ class MetricsService : public NotificationObserver,
   // Generates a new client ID to use to identify self to metrics server.
   static std::string GenerateClientID();
 
-#if defined(OS_POSIX)
-  // Generates a new client ID to use to identify self to metrics server,
-  // given 128 bits of randomness.
-  static std::string RandomBytesToGUIDString(const uint64 bytes[2]);
-#endif
-
   // Schedule the next save of LocalState information.  This is called
   // automatically by the task that performs each save to schedule the next one.
   void ScheduleNextStateSave();