Move ReadFileToString to the base namespace.

chrome/browser/printing/cloud_print/cloud_print_proxy_service.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/printing/cloud_print/cloud_print_proxy_service.h"
 
 #include <stack>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 107 matching lines @@
   return true;
 }
 
 void CloudPrintProxyService::GetPrintersAvalibleForRegistration(
       std::vector<std::string>* printers) {
   base::FilePath list_path(
       CommandLine::ForCurrentProcess()->GetSwitchValuePath(
           switches::kCloudPrintSetupProxy));
   if (!list_path.empty()) {
     std::string printers_json;
-    file_util::ReadFileToString(list_path, &printers_json);
+    base::ReadFileToString(list_path, &printers_json);
     scoped_ptr<Value> value(base::JSONReader::Read(printers_json));
     base::ListValue* list = NULL;
     if (value && value->GetAsList(&list) && list) {
       for (size_t i = 0; i < list->GetSize(); ++i) {
         std::string printer;
         if (list->GetString(i, &printer))
           printers->push_back(printer);
       }
     }
   } else {
@@ skipping 50 matching lines @@
 }
 
 bool CloudPrintProxyService::InvokeServiceTask(const base::Closure& task) {
   GetServiceProcessControl()->Launch(task, base::Closure());
   return true;
 }
 
 ServiceProcessControl* CloudPrintProxyService::GetServiceProcessControl() {
   return ServiceProcessControl::GetInstance();
 }