Factor out common error-code conversion code for PlatformFileErrorToNetError.

webkit/fileapi/file_system_file_stream_reader.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 "webkit/fileapi/file_system_file_stream_reader.h"
 
 #include "base/file_util_proxy.h"
 #include "base/platform_file.h"
 #include "base/sequenced_task_runner.h"
 #include "net/base/file_stream.h"
@@ skipping 61 matching lines @@
     const net::CompletionCallback& callback,
     base::PlatformFileError file_error,
     const base::PlatformFileInfo& file_info,
     const FilePath& platform_path,
     const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref) {
   DCHECK(has_pending_create_snapshot_);
   DCHECK(!local_file_reader_.get());
   has_pending_create_snapshot_ = false;
 
   if (file_error != base::PLATFORM_FILE_OK) {
-    callback.Run(
-        LocalFileStreamReader::PlatformFileErrorToNetError(file_error));
+    callback.Run(net::PlatformFileErrorToNetError(file_error));
     return;
   }
 
   // Keep the reference (if it's non-null) so that the file won't go away.
   snapshot_ref_ = file_ref;
 
   local_file_reader_.reset(
       new LocalFileStreamReader(file_system_context_->file_task_runner(),
                                 platform_path,
                                 initial_offset_,
                                 base::Time()));
 
   read_closure.Run();
 }
 
 }  // namespace fileapi