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

components/drive/remove_stale_cache_files.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 "chrome/browser/chromeos/drive/remove_stale_cache_files.h"
+#include "components/drive/remove_stale_cache_files.h"
 
 #include "base/logging.h"
 #include "components/drive/drive.pb.h"
 #include "components/drive/file_cache.h"
 #include "components/drive/resource_metadata.h"
 
 namespace drive {
 namespace internal {
 
 void RemoveStaleCacheFiles(FileCache* cache,
                            ResourceMetadata* resource_metadata) {
   scoped_ptr<ResourceMetadata::Iterator> it = resource_metadata->GetIterator();
   for (; !it->IsAtEnd(); it->Advance()) {
     const ResourceEntry& entry = it->GetValue();
     const FileCacheEntry& cache_state =
         entry.file_specific_info().cache_state();
     // Stale = not dirty but the MD5 does not match.
     if (!cache_state.is_dirty() &&
         cache_state.md5() != entry.file_specific_info().md5()) {
       FileError error = cache->Remove(it->GetID());
       LOG_IF(WARNING, error != FILE_ERROR_OK)
           << "Failed to remove a stale cache file. resource_id: "
           << it->GetID();
     }
   }
 }
 
 }  // namespace internal
 }  // namespace drive