Expand FeatureList to support FieldTrial association.

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 92917d86b573f066a90f912e1b560d46abcf54f3..192b348c420ae7910f1b3cd3cf0d4704b76ff7fe 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -680,9 +680,8 @@ void ChromeBrowserMainParts::SetupMetricsAndFieldTrials() {
   variations::VariationsService* variations_service =
       browser_process_->variations_service();
   if (variations_service)
-    variations_service->CreateTrialsFromSeed();
+    variations_service->CreateTrialsFromSeed(feature_list.get());
 
-  // TODO(asvitkine): Pass |feature_list| to CreateTrialsFromSeed() above.
   base::FeatureList::SetInstance(feature_list.Pass());
 
   // This must be called after |local_state_| is initialized.