Move ReadFileToString to the base namespace.

chrome/browser/google/google_util_chromeos.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
@@ skipping 10 matching lines @@
 namespace {
 
 // Path to file that stores the RLZ brand code on ChromeOS.
 const base::FilePath::CharType kRLZBrandFilePath[] =
     FILE_PATH_LITERAL("/opt/oem/etc/BRAND_CODE");
 
 // Reads the brand code from file |kRLZBrandFilePath|.
 std::string ReadBrandFromFile() {
   std::string brand;
   base::FilePath brand_file_path(kRLZBrandFilePath);
-  if (!file_util::ReadFileToString(brand_file_path, &brand))
+  if (!base::ReadFileToString(brand_file_path, &brand))
     LOG(WARNING) << "Brand code file missing: " << brand_file_path.value();
   TrimWhitespace(brand, TRIM_ALL, &brand);
   return brand;
 }
 
 // Sets the brand code to |brand|.
 void SetBrand(const base::Closure& callback, const std::string& brand) {
   g_browser_process->local_state()->SetString(prefs::kRLZBrand, brand);
   callback.Run();
 }
@@ skipping 23 matching lines @@
 void SetBrandFromFile(const base::Closure& callback) {
   base::PostTaskAndReplyWithResult(
       base::WorkerPool::GetTaskRunner(false /* task_is_slow */).get(),
       FROM_HERE,
       base::Bind(&ReadBrandFromFile),
       base::Bind(&SetBrand, callback));
 }
 
 }  // namespace chromeos
 }  // namespace google_util