Move chrome/browser/chromeos/drive/file_system.cc (+deps) into components/drive.

components/drive/directory_loader.h

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_DRIVE_DIRECTORY_LOADER_H_
-#define CHROME_BROWSER_CHROMEOS_DRIVE_DIRECTORY_LOADER_H_
+#ifndef COMPONENTS_DRIVE_DIRECTORY_LOADER_H_
+#define COMPONENTS_DRIVE_DIRECTORY_LOADER_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ skipping 123 matching lines @@
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<DirectoryLoader> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(DirectoryLoader);
 };
 
 }  // namespace internal
 }  // namespace drive
 
-#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DIRECTORY_LOADER_H_
+#endif  // COMPONENTS_DRIVE_DIRECTORY_LOADER_H_