fileapi: Rename FileSystemMountProvider to FileSystemBackend

chrome/browser/chromeos/drive/file_system_proxy.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/chromeos/drive/file_system_proxy.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 365 matching lines @@
   return scoped_ptr<webkit_blob::FileStreamReader>(
       new internal::WebkitFileStreamReaderImpl(
           base::Bind(&FileSystemProxy::GetFileSystemOnUIThread, this),
           file_task_runner,
           drive_file_path,
           offset,
           expected_modification_time));
 }
 
 FileSystemProxy::~FileSystemProxy() {
-  // Should be deleted from the CrosMountPointProvider on UI thread.
+  // Should be deleted from the FileSystemBackend on UI thread.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
 // static.
 bool FileSystemProxy::ValidateUrl(
     const FileSystemURL& url, base::FilePath* file_path) {
   *file_path = util::ExtractDrivePathFromFileSystemUrl(url);
   return !file_path->empty();
 }
 
@@ skipping 49 matching lines @@
       base::Bind(&internal::FileApiWorker::CloseFile,
                  base::Unretained(worker_.get()), virtual_path));
 }
 
 FileSystemInterface* FileSystemProxy::GetFileSystemOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return file_system_;
 }
 
 }  // namespace drive