Drive: Removes unused cache files after the initial feed fetch.

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.h b/chrome/browser/chromeos/gdata/gdata_file_system.h
index 452f6b10a625085b42e4b4d0bbf9f28796e01a7e..a4b510d5cdee37eb8b040dd8ee001a13a175021e 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.h
@@ -35,6 +35,7 @@ namespace gdata {
 class DocumentsServiceInterface;
 class DriveWebAppsRegistryInterface;
 class GDataWapiFeedLoader;
+class StaleCacheFilesRemover;
 struct UploadFileInfo;
 
 // The production implementation of GDataFileSystemInterface.
@@ -857,6 +858,9 @@ class GDataFileSystem : public GDataFileSystemInterface,
   // The loader is used to load the feeds.
   scoped_ptr<GDataWapiFeedLoader> feed_loader_;
 
+  // The remover is used to remove stale cache files.
+  scoped_ptr<StaleCacheFilesRemover> stale_cache_file_remover_;
+
   ObserverList<GDataFileSystemInterface::Observer> observers_;
 
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;