Move ReadFileToString to the base namespace.

chrome/browser/chromeos/mobile/mobile_activator.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/mobile/mobile_activator.h"
 
 #include <algorithm>
 #include <map>
 #include <string>
 
@@ skipping 100 matching lines @@
 
 void CellularConfigDocument::SetErrorMap(
     const ErrorMap& map) {
   base::AutoLock create(config_lock_);
   error_map_.clear();
   error_map_.insert(map.begin(), map.end());
 }
 
 bool CellularConfigDocument::LoadFromFile(const base::FilePath& config_path) {
   std::string config;
-  if (!file_util::ReadFileToString(config_path, &config))
+  if (!base::ReadFileToString(config_path, &config))
     return false;
 
   scoped_ptr<Value> root(
       base::JSONReader::Read(config, base::JSON_ALLOW_TRAILING_COMMAS));
   DCHECK(root.get() != NULL);
   if (!root.get() || root->GetType() != Value::TYPE_DICTIONARY) {
     LOG(WARNING) << "Bad cellular config file";
     return false;
   }
 
@@ skipping 887 matching lines @@
   cellular_plan_payment_time_ = base::Time::Now();
 }
 
 bool MobileActivator::HasRecentCellularPlanPayment() const {
   const int kRecentPlanPaymentHours = 6;
   return (base::Time::Now() -
           cellular_plan_payment_time_).InHours() < kRecentPlanPaymentHours;
 }
 
 }  // namespace chromeos