Move ReadFileToString to the base namespace.

chrome/browser/page_cycler/page_cycler_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/path_service.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 72 matching lines @@
     std::vector<GURL> urls;
     urls.push_back(test_server()->GetURL("files/page_cycler/basic_html.html"));
     urls.push_back(test_server()->GetURL("files/page_cycler/basic_js.html"));
     urls.push_back(test_server()->GetURL("files/page_cycler/basic_css.html"));
     return urls;
   }
 
   // Read the errors file, and generate a vector of error strings.
   std::vector<std::string> GetErrorsFromFile() {
     std::string error_file_contents;
-    CHECK(file_util::ReadFileToString(errors_file_,
-                                      &error_file_contents));
+    CHECK(base::ReadFileToString(errors_file_, &error_file_contents));
     if (error_file_contents[error_file_contents.size() - 1] == '\n')
       error_file_contents.resize(error_file_contents.size() - 1);
 
     std::vector<std::string> errors;
     base::SplitString(error_file_contents, '\n', &errors);
 
     return errors;
   }
 
   // Convert a vector of GURLs into a newline-separated string, ready to be
@@ skipping 285 matching lines @@
   ASSERT_EQ(1u, errors.size());
 
   std::string expected_error;
   expected_error.append("Failed to load the page at: ")
       .append(kCacheMissURL)
       .append(": The requested entry was not found in the cache.");
 
   ASSERT_FALSE(errors[0].compare(expected_error));
 }
 #endif  // !defined(OS_CHROMEOS)