Move ReadFileToString to the base namespace.

content/browser/accessibility/dump_accessibility_tree_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 <set>
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 122 matching lines @@
       dir_test_data.Append(FILE_PATH_LITERAL("accessibility")));
   ASSERT_TRUE(base::PathExists(test_path))
       << test_path.LossyDisplayName();
 
   base::FilePath html_file = test_path.Append(base::FilePath(file_path));
   // Output the test path to help anyone who encounters a failure and needs
   // to know where to look.
   printf("Testing: %s\n", html_file.MaybeAsASCII().c_str());
 
   std::string html_contents;
-  file_util::ReadFileToString(html_file, &html_contents);
+  base::ReadFileToString(html_file, &html_contents);
 
   // Read the expected file.
   std::string expected_contents_raw;
   base::FilePath expected_file =
     base::FilePath(html_file.RemoveExtension().value() +
                    AccessibilityTreeFormatter::GetExpectedFileSuffix());
-  file_util::ReadFileToString(expected_file, &expected_contents_raw);
+  base::ReadFileToString(expected_file, &expected_contents_raw);
 
   // Tolerate Windows-style line endings (\r\n) in the expected file:
   // normalize by deleting all \r from the file (if any) to leave only \n.
   std::string expected_contents;
   RemoveChars(expected_contents_raw, "\r", &expected_contents);
 
   if (!expected_contents.compare(0, strlen(kMarkSkipFile), kMarkSkipFile)) {
     printf("Skipping this test on this platform.\n");
     return;
   }
@@ skipping 286 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityUl) {
   RunTest(FILE_PATH_LITERAL("ul.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityWbr) {
   RunTest(FILE_PATH_LITERAL("wbr.html"));
 }
 
 }  // namespace content