Expand FeatureList to support FieldTrial association.

components/variations/service/variations_service.cc

Index: components/variations/service/variations_service.cc
diff --git a/components/variations/service/variations_service.cc b/components/variations/service/variations_service.cc
index e0f9a0107ece0c832f17e42345a3dd044156a882..41710721fdf7f47ca8e1008e69f4efad3d48333f 100644
--- a/components/variations/service/variations_service.cc
+++ b/components/variations/service/variations_service.cc
@@ -223,7 +223,7 @@ VariationsService::VariationsService(
 VariationsService::~VariationsService() {
 }
 
-bool VariationsService::CreateTrialsFromSeed() {
+bool VariationsService::CreateTrialsFromSeed(base::FeatureList* feature_list) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   create_trials_from_seed_called_ = true;
@@ -252,7 +252,8 @@ bool VariationsService::CreateTrialsFromSeed() {
       GetCurrentFormFactor(), GetHardwareClass(), latest_country,
       LoadPermanentConsistencyCountry(current_version, latest_country),
       base::Bind(&UIStringOverrider::OverrideUIString,
-                 base::Unretained(&ui_string_overrider_)));
+                 base::Unretained(&ui_string_overrider_)),
+      feature_list);
 
   const base::Time now = base::Time::Now();