Move dir_reader to base/files

base/files/dir_reader_fallback.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
-#ifndef BASE_DIR_READER_FALLBACK_H_
-#define BASE_DIR_READER_FALLBACK_H_
+#ifndef BASE_FILES_DIR_READER_FALLBACK_H_
+#define BASE_FILES_DIR_READER_FALLBACK_H_
 #pragma once
 
 namespace base {
 
 class DirReaderFallback {
  public:
   // Open a directory. If |IsValid| is true, then |Next| can be called to start
   // the iteration at the beginning of the directory.
-  explicit DirReaderFallback(const char* directory_path) { }
+  explicit DirReaderFallback(const char* directory_path) {}
+
   // After construction, IsValid returns true iff the directory was
   // successfully opened.
   bool IsValid() const { return false; }
+
   // Move to the next entry returning false if the iteration is complete.
   bool Next() { return false; }
+
   // Return the name of the current directory entry.
   const char* name() { return 0;}
+
   // Return the file descriptor which is being used.
   int fd() const { return -1; }
+
   // Returns true if this is a no-op fallback class (for testing).
   static bool IsFallback() { return true; }
 };
 
 }  // namespace base
 
-#endif  // BASE_DIR_READER_FALLBACK_H_
+#endif  // BASE_FILES_DIR_READER_FALLBACK_H_