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

chrome/browser/chromeos/gdata/gdata_file_system.cc

Index: chrome/browser/chromeos/gdata/gdata_file_system.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.cc b/chrome/browser/chromeos/gdata/gdata_file_system.cc
index e52546500c80ed5edb44b65a8f2b3a1edc4015f1..4e27e19fe2d6c86e32dc5b429a550ac6d14f4e88 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.cc
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.cc
@@ -24,6 +24,7 @@
 #include "chrome/browser/chromeos/gdata/gdata_protocol_handler.h"
 #include "chrome/browser/chromeos/gdata/gdata_system_service.h"
 #include "chrome/browser/chromeos/gdata/gdata_util.h"
+#include "chrome/browser/chromeos/gdata/stale_cache_files_remover.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -537,6 +538,7 @@ void GDataFileSystem::Initialize() {
                                              cache_,
                                              blocking_task_runner_));
   feed_loader_->AddObserver(this);
+  stale_cache_files_remover_.reset(new StaleCacheFilesRemover(this, cache_));
 
   PrefService* pref_service = profile_->GetPrefs();
   hide_hosted_docs_ = pref_service->GetBoolean(prefs::kDisableGDataHostedFiles);