Move ReadFileToString to the base namespace.

chrome/browser/sessions/better_session_restore_browsertest.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 "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
@@ skipping 109 matching lines @@
     test_files.push_back("session_storage.html");
     base::FilePath test_file_dir;
     CHECK(PathService::Get(base::DIR_SOURCE_ROOT, &test_file_dir));
     test_file_dir =
         test_file_dir.AppendASCII("chrome/test/data").AppendASCII(test_path_);
 
     for (std::vector<std::string>::const_iterator it = test_files.begin();
          it != test_files.end(); ++it) {
       base::FilePath path = test_file_dir.AppendASCII(*it);
       std::string contents;
-      CHECK(file_util::ReadFileToString(path, &contents));
+      CHECK(base::ReadFileToString(path, &contents));
       g_file_contents.Get()["/" + test_path_ + *it] = contents;
       net::URLRequestFilter::GetInstance()->AddUrlHandler(
           GURL(fake_server_address_ + test_path_ + *it),
           &URLRequestFaker);
     }
     net::URLRequestFilter::GetInstance()->AddUrlHandler(
         GURL(fake_server_address_ + test_path_ + "posted.php"),
         &URLRequestFakerForPostRequests);
   }
 
@@ skipping 383 matching lines @@
       SetDefaultCookieSetting(CONTENT_SETTING_SESSION_ONLY);
 }
 
 IN_PROC_BROWSER_TEST_F(NoSessionRestoreTest, CookiesClearedOnExit) {
   content::WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   EXPECT_EQ(std::string(content::kAboutBlankURL),
             web_contents->GetURL().spec());
   StoreDataWithPage("local_storage.html");
 }