Android: Eliminate sync_file_system extensions code.

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 "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 106 matching lines @@
           this, origin));
 }
 
 void BrowsingDataFileSystemHelperImpl::FetchFileSystemInfoInFileThread() {
   DCHECK(file_task_runner()->RunsTasksOnCurrentThread());
 
   // We check usage for these filesystem types.
   const fileapi::FileSystemType types[] = {
     fileapi::kFileSystemTypeTemporary,
     fileapi::kFileSystemTypePersistent,
+#if defined(ENABLE_EXTENSIONS)
     fileapi::kFileSystemTypeSyncable,
+#endif
   };
 
   typedef std::map<GURL, FileSystemInfo> OriginInfoMap;
   OriginInfoMap file_system_info_map;
   for (size_t i = 0; i < arraysize(types); ++i) {
     fileapi::FileSystemType type = types[i];
     fileapi::FileSystemQuotaUtil* quota_util =
       filesystem_context_->GetQuotaUtil(type);
     DCHECK(quota_util);
     std::set<GURL> origins;
@@ skipping 112 matching lines @@
 }
 
 void CannedBrowsingDataFileSystemHelper::StartFetching(
     const base::Callback<void(const std::list<FileSystemInfo>&)>& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE, base::Bind(callback, file_system_info_));
 }