Move ReadFileToString to the base namespace.

chrome/browser/spellchecker/spellcheck_custom_dictionary_unittest.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 <vector>
 
 #include "base/file_util.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 287 matching lines @@
   WordList loaded_custom_words = LoadDictionaryFile(path);
   WordList expected;
   expected.push_back("bar");
   expected.push_back("foo");
   EXPECT_EQ(expected, loaded_custom_words);
 
   SpellcheckCustomDictionary::Change change;
   change.AddWord("baz");
   UpdateDictionaryFile(change, path);
   content.clear();
-  file_util::ReadFileToString(path, &content);
+  base::ReadFileToString(path, &content);
   content.append("corruption");
   file_util::WriteFile(path, content.c_str(), content.length());
   loaded_custom_words = LoadDictionaryFile(path);
   EXPECT_EQ(expected, loaded_custom_words);
 }
 
 TEST_F(SpellcheckCustomDictionaryTest,
        GetAllSyncDataAccuratelyReflectsDictionaryState) {
   SpellcheckCustomDictionary* dictionary =
       SpellcheckServiceFactory::GetForProfile(
@@ skipping 810 matching lines @@
       SpellcheckServiceFactory::GetForProfile(&profile_);
   SpellcheckCustomDictionary* custom_dictionary =
       spellcheck_service->GetCustomDictionary();
   OnLoaded(*custom_dictionary, WordList());
   EXPECT_FALSE(custom_dictionary->HasWord("foo"));
   EXPECT_FALSE(custom_dictionary->HasWord("bar"));
   custom_dictionary->AddWord("foo");
   EXPECT_TRUE(custom_dictionary->HasWord("foo"));
   EXPECT_FALSE(custom_dictionary->HasWord("bar"));
 }