Move ReadFileToString to the base namespace.

chrome/common/extensions/extension_file_util.cc

 // Copyright (c) 2013 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 "chrome/common/extensions/extension_file_util.h"
 
 #include <map>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 193 matching lines @@
   std::vector<base::FilePath> result;
   // Pattern matching only works at the root level, so filter manually.
   base::FileEnumerator traversal(extension_dir, /*recursive=*/true,
                                  base::FileEnumerator::FILES);
   for (base::FilePath current = traversal.Next(); !current.empty();
        current = traversal.Next()) {
     if (!current.MatchesExtension(extensions::kExtensionKeyFileExtension))
       continue;
 
     std::string key_contents;
-    if (!file_util::ReadFileToString(current, &key_contents)) {
+    if (!base::ReadFileToString(current, &key_contents)) {
       // If we can't read the file, assume it's not a private key.
       continue;
     }
     std::string key_bytes;
     if (!Extension::ParsePEMKeyBytes(key_contents, &key_bytes)) {
       // If we can't parse the key, assume it's ok too.
       continue;
     }
 
     result.push_back(current);
@@ skipping 341 matching lines @@
     return base::FilePath();
   }
   return temp_path;
 }
 
 void DeleteFile(const base::FilePath& path, bool recursive) {
   base::DeleteFile(path, recursive);
 }
 
 }  // namespace extension_file_util