Removing extensions::FeatureSwitch which is no longer used

chrome/browser/extensions/extension_sync_service.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 "chrome/browser/extensions/extension_sync_service.h"
 
 #include <iterator>
 
 #include "base/basictypes.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 23 matching lines @@
 #include "extensions/common/feature_switch.h"
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/manifest_handlers/icons_handler.h"
 #include "sync/api/sync_change.h"
 #include "sync/api/sync_error_factory.h"
 #include "ui/gfx/image/image_family.h"
 
 using extensions::Extension;
 using extensions::ExtensionPrefs;
 using extensions::ExtensionRegistry;
-using extensions::FeatureSwitch;
 
 namespace {
 
 void OnWebApplicationInfoLoaded(
     WebApplicationInfo synced_info,
     base::WeakPtr<ExtensionService> extension_service,
     const WebApplicationInfo& loaded_info) {
   DCHECK_EQ(synced_info.app_url, loaded_info.app_url);
 
   if (!extension_service)
@@ skipping 489 matching lines @@
       app_sync_bundle_.SyncChangeIfNeeded(extension);
     else if (extension_service_->is_ready() && !flare_.is_null())
       flare_.Run(syncer::APPS);
   } else if (extensions::util::ShouldSyncExtension(&extension, profile_)) {
     if (extension_sync_bundle_.IsSyncing())
       extension_sync_bundle_.SyncChangeIfNeeded(extension);
     else if (extension_service_->is_ready() && !flare_.is_null())
       flare_.Run(syncer::EXTENSIONS);
   }
 }