Resetting metrics ids on clump detection.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index b71cd5131bd93debb20a904339fc24ab7f062b7b..e47855ab5f7e823e608d9dd19f5af0d99a63d0b9 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -578,11 +578,12 @@ void ChromeBrowserMainParts::SetupMetricsAndFieldTrials() {
   // Initialize FieldTrialList to support FieldTrials that use one-time
   // randomization.
   MetricsService* metrics = browser_process_->metrics_service();
+
   MetricsService::ReportingState reporting_state =
       IsMetricsReportingEnabled() ? MetricsService::REPORTING_ENABLED :
                                     MetricsService::REPORTING_DISABLED;
-  if (reporting_state == MetricsService::REPORTING_ENABLED)
-    metrics->ForceClientIdCreation();  // Needed below.
+  metrics->InitializeVariationsState(
+      reporting_state == MetricsService::REPORTING_ENABLED);
   field_trial_list_.reset(
       new base::FieldTrialList(
           metrics->CreateEntropyProvider(reporting_state).release()));