Move ReadFileToString to the base namespace.

chrome/browser/extensions/api/push_messaging/sync_setup_helper.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/extensions/api/push_messaging/sync_setup_helper.h"
 
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/strings/string_util.h"
@@ skipping 32 matching lines @@
   // changes have propagated between the clients.
   // This could take several seconds.
   AwaitQuiescence();
   return true;
 }
 
 // Read the sync signin credentials from a file on the machine.
 bool SyncSetupHelper::ReadPasswordFile(const base::FilePath& password_file) {
   // TODO(dcheng): Convert format of config file to JSON.
   std::string file_contents;
-  bool success = file_util::ReadFileToString(password_file, &file_contents);
+  bool success = base::ReadFileToString(password_file, &file_contents);
   EXPECT_TRUE(success)
       << "Password file \""
       << password_file.value() << "\" does not exist.";
   if (!success)
     return false;
 
   std::vector<std::string> tokens;
   std::string delimiters = "\r\n";
   Tokenize(file_contents, delimiters, &tokens);
   EXPECT_EQ(5U, tokens.size()) << "Password file \""
       << password_file.value()
       << "\" must contain exactly five lines of text.";
   if (5U != tokens.size())
     return false;
   username_ = tokens[0];
   password_ = tokens[1];
   client_id_ = tokens[2];
   client_secret_ = tokens[3];
   refresh_token_ = tokens[4];
   return true;
 }
 
 bool SyncSetupHelper::AwaitQuiescence() {
   std::vector<ProfileSyncServiceHarness*> clients;
   clients.push_back(client_.get());
   return ProfileSyncServiceHarness::AwaitQuiescence(clients);
 }
 
 }  // namespace extensions