Componentize enhanced_bookmark_features.{h,cc}.

ios/public/provider/chrome/browser/chrome_browser_provider.cc

 // Copyright 2013 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 "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 
 #include "base/logging.h"
 
 namespace ios {
 
@@ skipping 56 matching lines @@
   return nullptr;
 }
 
 void ChromeBrowserProvider::ShowTranslateSettings() {
 }
 
 std::string ChromeBrowserProvider::GetDistributionBrandCode() {
   return std::string();
 }
 
-bool ChromeBrowserProvider::IsBookmarkCollectionEnabled() {
-  return false;
-}
-
 const char* ChromeBrowserProvider::GetChromeUIScheme() {
   return nullptr;
 }
 
 void ChromeBrowserProvider::SetUIViewAlphaWithAnimation(UIView* view,
                                                         float alpha) {
 }
 
 metrics::MetricsService* ChromeBrowserProvider::GetMetricsService() {
   return nullptr;
@@ skipping 25 matching lines @@
 
 rappor::RapporService* ChromeBrowserProvider::GetRapporService() {
   return nullptr;
 }
 
 SearchProvider* ChromeBrowserProvider::GetSearchProvider() {
   return nullptr;
 }
 
 }  // namespace ios