Move ReadFileToString to the base namespace.

chrome/browser/extensions/extension_resource_request_policy_apitest.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/logging.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/test_switches.h"
@@ skipping 70 matching lines @@
   ui_test_utils::NavigateToURL(browser(), non_existent_extension);
   ASSERT_TRUE(content::ExecuteScriptAndExtractString(
       browser()->tab_strip_model()->GetActiveWebContents(),
       "window.domAutomationController.send(document.title)",
       &result));
   EXPECT_EQ(result, "Image failed to load");
 
   // A data URL. Data URLs should always be able to load chrome-extension://
   // resources.
   std::string file_source;
-  ASSERT_TRUE(file_util::ReadFileToString(
+  ASSERT_TRUE(base::ReadFileToString(
       test_data_dir_.AppendASCII("extension_resource_request_policy")
                     .AppendASCII("index.html"), &file_source));
   ui_test_utils::NavigateToURL(browser(),
       GURL(std::string("data:text/html;charset=utf-8,") + file_source));
   ASSERT_TRUE(content::ExecuteScriptAndExtractString(
       browser()->tab_strip_model()->GetActiveWebContents(),
       "window.domAutomationController.send(document.title)",
       &result));
   EXPECT_EQ(result, "Loaded");
 
@@ skipping 182 matching lines @@
 
 #if defined(OS_MACOSX)
 #define MAYBE_ExtensionAccessibleResources DISABLED_ExtensionAccessibleResources
 #else
 #define MAYBE_ExtensionAccessibleResources ExtensionAccessibleResources
 #endif
 IN_PROC_BROWSER_TEST_F(ExtensionResourceRequestPolicyTest,
                        MAYBE_ExtensionAccessibleResources) {
   ASSERT_TRUE(RunExtensionSubtest("accessible_cer", "main.html")) << message_;
 }