Move ReadFileToString to the base namespace.

chrome_frame/test/html_util_unittests.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 <windows.h>
 #include <atlsecurity.h>
 #include <shellapi.h>
 #include <string>
 #include <vector>
 
@@ skipping 49 matching lines @@
       return false;
     }
 
     base::FilePath path;
     if (!GetTestPath(test_case, &path)) {
       NOTREACHED();
       return false;
     }
 
     std::string raw_data;
-    file_util::ReadFileToString(path, &raw_data);
+    base::ReadFileToString(path, &raw_data);
 
     // Convert to wide using the "best effort" assurance described in
     // string_util.h
     data->assign(UTF8ToWide(raw_data));
     return true;
   }
 };
 
 TEST_F(HtmlUtilUnittest, BasicTest) {
   std::wstring test_data;
@@ skipping 413 matching lines @@
     "Content-Length: 42\r\n"
     "X-Frame-Options: SAMEORIGIN\r\n"));
   EXPECT_TRUE(http_utils::HasFrameBustingHeader(
     "X-Frame-Options: deny\r\n"
     "X-Frame-Options: ALLOWall\r\n"
     "Content-Length: 42\r\n"));
   EXPECT_TRUE(http_utils::HasFrameBustingHeader(
     "X-Frame-Options: SAMEORIGIN\r\n"
     "X-Frame-Options: ALLOWall\r\n"));
 }