Move ReadFileToString to the base namespace.

content/shell/browser/shell_message_filter.cc

 // Copyright 2013 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 "content/shell/browser/shell_message_filter.h"
 
 #include "base/file_util.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/shell/browser/shell_browser_context.h"
@@ skipping 43 matching lines @@
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_DeleteAllCookies, OnDeleteAllCookies)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void ShellMessageFilter::OnReadFileToString(const base::FilePath& local_file,
                                             std::string* contents) {
   base::ThreadRestrictions::ScopedAllowIO allow_io;
-  file_util::ReadFileToString(local_file, contents);
+  base::ReadFileToString(local_file, contents);
 }
 
 void ShellMessageFilter::OnRegisterIsolatedFileSystem(
     const std::vector<base::FilePath>& absolute_filenames,
     std::string* filesystem_id) {
   fileapi::IsolatedContext::FileInfoSet files;
   ChildProcessSecurityPolicy* policy =
       ChildProcessSecurityPolicy::GetInstance();
   for (size_t i = 0; i < absolute_filenames.size(); ++i) {
     files.AddPath(absolute_filenames[i], NULL);
@@ skipping 21 matching lines @@
   ShellNetworkDelegate::SetAcceptAllCookies(accept);
 }
 
 void ShellMessageFilter::OnDeleteAllCookies() {
   request_context_getter_->GetURLRequestContext()->cookie_store()
       ->GetCookieMonster()
       ->DeleteAllAsync(net::CookieMonster::DeleteCallback());
 }
 
 }  // namespace content