Move ReadFileToString to the base namespace.

chrome/browser/history/url_index_private_data.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 "chrome/browser/history/url_index_private_data.h"
 
 #include <algorithm>
 #include <functional>
 #include <iterator>
 #include <limits>
@@ skipping 383 matching lines @@
 // static
 scoped_refptr<URLIndexPrivateData> URLIndexPrivateData::RestoreFromFile(
     const base::FilePath& file_path,
     const std::string& languages) {
   base::TimeTicks beginning_time = base::TimeTicks::Now();
   if (!base::PathExists(file_path))
     return NULL;
   std::string data;
   // If there is no cache file then simply give up. This will cause us to
   // attempt to rebuild from the history database.
-  if (!file_util::ReadFileToString(file_path, &data))
+  if (!base::ReadFileToString(file_path, &data))
     return NULL;
 
   scoped_refptr<URLIndexPrivateData> restored_data(new URLIndexPrivateData);
   InMemoryURLIndexCacheItem index_cache;
   if (!index_cache.ParseFromArray(data.c_str(), data.size())) {
     LOG(WARNING) << "Failed to parse URLIndexPrivateData cache data read from "
                  << file_path.value();
     return restored_data;
   }
 
@@ skipping 915 matching lines @@
   // recently visited (within the last 12/24 hours) as highly important. Get
   // input from mpearson.
   if (r1.typed_count() != r2.typed_count())
     return (r1.typed_count() > r2.typed_count());
   if (r1.visit_count() != r2.visit_count())
     return (r1.visit_count() > r2.visit_count());
   return (r1.last_visit() > r2.last_visit());
 }
 
 }  // namespace history