Move enable extensions define to a build flag.

chrome/browser/browsing_data/browsing_data_file_system_helper.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 "chrome/browser/browsing_data/browsing_data_file_system_helper.h"
 
 #include <memory>
 #include <set>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "content/public/browser/browser_thread.h"
+#include "extensions/features/features.h"
 #include "storage/browser/fileapi/file_system_context.h"
 #include "storage/browser/fileapi/file_system_quota_util.h"
 #include "storage/common/fileapi/file_system_types.h"
 
 using content::BrowserThread;
 
 namespace storage {
 class FileSystemContext;
 }
 
@@ skipping 66 matching lines @@
 
 void BrowsingDataFileSystemHelperImpl::FetchFileSystemInfoInFileThread(
     const FetchCallback& callback) {
   DCHECK(file_task_runner()->RunsTasksOnCurrentThread());
   DCHECK(!callback.is_null());
 
   // We check usage for these filesystem types.
   const storage::FileSystemType types[] = {
     storage::kFileSystemTypeTemporary,
     storage::kFileSystemTypePersistent,
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
     storage::kFileSystemTypeSyncable,
 #endif
   };
 
   std::list<FileSystemInfo> result;
   typedef std::map<GURL, FileSystemInfo> OriginInfoMap;
   OriginInfoMap file_system_info_map;
   for (size_t i = 0; i < arraysize(types); ++i) {
     storage::FileSystemType type = types[i];
     storage::FileSystemQuotaUtil* quota_util =
@@ skipping 90 matching lines @@
 }
 
 void CannedBrowsingDataFileSystemHelper::StartFetching(
     const FetchCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(!callback.is_null());
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE, base::Bind(callback, file_system_info_));
 }