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 e4f88c5bdf463f55b6e3e3be3a09da8a6ef012c1..af247c363118a6c89a5c575f9ddd9095787e1ca5 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -694,9 +694,8 @@ 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.