Change the copyright from Chromium OS to Chromium.

ui/file_manager/zip_archiver/cpp/request.cc

-// Copyright 2014 The Chromium OS Authors. All rights reserved.
+// Copyright 2014 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 "request.h"
 
 #include <sstream>
 
 namespace {
 
 // Creates a basic request with the mandatory fields.
@@ skipping 170 matching lines @@
   return request;
 }
 
 int64_t request::GetInt64FromString(const pp::VarDictionary& dictionary,
                                     const std::string& request_key) {
   std::stringstream ss_int64(dictionary.Get(request_key).AsString());
   int64_t int64_value;
   ss_int64 >> int64_value;
   return int64_value;
 }