Added Net logging to FileStream.

net/base/file_stream_net_log_parameters.h

Index: net/base/file_stream_net_log_parameters.h
diff --git a/net/base/file_stream_net_log_parameters.h b/net/base/file_stream_net_log_parameters.h
new file mode 100644
index 0000000000000000000000000000000000000000..92689ab70fe529be5a6258cb7703aacd7cd6a107
--- /dev/null
+++ b/net/base/file_stream_net_log_parameters.h
@@ -0,0 +1,36 @@
+// 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.
+
+// File stream error reporting.
+
+#ifndef NET_BASE_FILE_STREAM_NET_LOG_PARAMETERS_H_
+#define NET_BASE_FILE_STREAM_NET_LOG_PARAMETERS_H_
+#pragma once
+
+#include <string>
+
+#include "net/base/net_errors.h"
+#include "net/base/net_log.h"
+
+namespace net {
+
+// NetLog parameters when a FileStream has an error.
+class FileStreamErrorParameters : public net::NetLog::EventParameters {
+ public:
+  FileStreamErrorParameters(const std::string& operation,
+                            int os_error,
+                            net::Error net_error);
+  virtual base::Value* ToValue() const OVERRIDE;
+
+ private:
+  std::string operation_;
+  int os_error_;
+  net::Error net_error_;
+
+  DISALLOW_COPY_AND_ASSIGN(FileStreamErrorParameters);
+};
+
+}  // namespace net
+
+#endif  // NET_BASE_FILE_STREAM_NET_LOG_PARAMETERS_H_