Expand FeatureList to support FieldTrial association.

components/variations/service/variations_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/variations/service/variations_service.h"
 
 #include "base/build_time.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/sparse_histogram.h"
@@ skipping 205 matching lines @@
       disable_deltas_for_next_request_(false),
       resource_request_allowed_notifier_(notifier.Pass()),
       request_count_(0),
       weak_ptr_factory_(this) {
   resource_request_allowed_notifier_->Init(this);
 }
 
 VariationsService::~VariationsService() {
 }
 
-bool VariationsService::CreateTrialsFromSeed() {
+bool VariationsService::CreateTrialsFromSeed(base::FeatureList* feature_list) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   create_trials_from_seed_called_ = true;
 
   variations::VariationsSeed seed;
   if (!seed_store_.LoadSeed(&seed))
     return false;
 
   const base::Version current_version(version_info::GetVersionNumber());
   if (!current_version.IsValid())
     return false;
 
   variations::Study_Channel channel =
       GetChannelForVariations(client_->GetChannel());
   UMA_HISTOGRAM_SPARSE_SLOWLY("Variations.UserChannel", channel);
 
   const std::string latest_country =
       local_state_->GetString(prefs::kVariationsCountry);
   // Note that passing |&ui_string_overrider_| via base::Unretained below is
   // safe because the callback is executed synchronously. It is not possible
   // to pass UIStringOverrider itself to VariationSeedProcesor as variations
   // components should not depends on //ui/base.
   variations::VariationsSeedProcessor().CreateTrialsFromSeed(
       seed, client_->GetApplicationLocale(),
       GetReferenceDateForExpiryChecks(local_state_), current_version, channel,
       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();
 
   // Log the "freshness" of the seed that was just used. The freshness is the
   // time between the last successful seed download and now.
   const int64 last_fetch_time_internal =
       local_state_->GetInt64(prefs::kVariationsLastFetchTime);
   if (last_fetch_time_internal) {
     const base::TimeDelta delta =
         now - base::Time::FromInternalValue(last_fetch_time_internal);
@@ skipping 494 matching lines @@
   // Otherwise, update the pref with the current Chrome version and country.
   base::ListValue new_list_value;
   new_list_value.AppendString(version.GetString());
   new_list_value.AppendString(latest_country);
   local_state_->Set(prefs::kVariationsPermanentConsistencyCountry,
                     new_list_value);
   return latest_country;
 }
 
 }  // namespace variations