Move ReadFileToString to the base namespace.

chrome/browser/chromeos/boot_times_loader.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/chromeos/boot_times_loader.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 243 matching lines @@
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
       base::Bind(&RecordStatsDelayed, name, stats.uptime, stats.disk));
 }
 
 BootTimesLoader::Stats BootTimesLoader::GetCurrentStats() {
   const base::FilePath kProcUptime(FPL("/proc/uptime"));
   const base::FilePath kDiskStat(FPL("/sys/block/sda/stat"));
   Stats stats;
   base::ThreadRestrictions::ScopedAllowIO allow_io;
-  file_util::ReadFileToString(kProcUptime, &stats.uptime);
-  file_util::ReadFileToString(kDiskStat, &stats.disk);
+  base::ReadFileToString(kProcUptime, &stats.uptime);
+  base::ReadFileToString(kDiskStat, &stats.disk);
   return stats;
 }
 
 void BootTimesLoader::RecordCurrentStats(const std::string& name) {
   RecordStats(name, GetCurrentStats());
 }
 
 void BootTimesLoader::SaveChromeMainStats() {
   chrome_main_stats_ = GetCurrentStats();
 }
@@ skipping 104 matching lines @@
           GetRenderWidgetHost(&web_contents->GetController());
       render_widget_hosts_loading_.erase(render_widget_host);
       break;
     }
     default:
       break;
   }
 }
 
 }  // namespace chromeos