Give access to a network time kept in the variation service.

chrome/browser/metrics/variations/variations_service.h

Index: chrome/browser/metrics/variations/variations_service.h
diff --git a/chrome/browser/metrics/variations/variations_service.h b/chrome/browser/metrics/variations/variations_service.h
index cd5bd36cd199912fb0d43d478409f9cfcbdb2cd2..95323c2f517e39fcd430c9ba9b6274d0c9fc6d88 100644
--- a/chrome/browser/metrics/variations/variations_service.h
+++ b/chrome/browser/metrics/variations/variations_service.h
@@ -15,6 +15,7 @@
 #include "base/timer.h"
 #include "chrome/browser/metrics/proto/study.pb.h"
 #include "chrome/browser/metrics/proto/trials_seed.pb.h"
+#include "chrome/browser/metrics/variations/network_time_tracker.h"
 #include "chrome/browser/metrics/variations/resource_request_allowed_notifier.h"
 #include "chrome/common/chrome_version_info.h"
 #include "googleurl/src/gurl.h"
@@ -47,6 +48,11 @@ class VariationsService
   // |CreateTrialsFromSeed|.
   void StartRepeatedVariationsSeedFetch();
 
+  // TODO(mad): Remove this once NetworkTimeTracker is available as a global
+  // service.
+  bool GetNetworkTime(base::Time* network_time,
+                      base::TimeDelta* uncertainty) const;
+
 #if defined(OS_WIN)
   // Starts syncing Google Update Variation IDs with the registry.
   void StartGoogleUpdateRegistrySync();
@@ -183,6 +189,9 @@ class VariationsService
   // latency of seed requests. Initially zero.
   base::TimeTicks last_request_started_time_;
 
+  // TODO(mad): Eventually remove this.
+  NetworkTimeTracker network_time_tracker_;
+
 #if defined(OS_WIN)
   // Helper that handles synchronizing Variations with the Registry.
   VariationsRegistrySyncer registry_syncer_;