SyncFS: Introduce SyncFileSystemBackend

webkit/browser/fileapi/syncable/syncable_file_system_unittest.cc

Index: webkit/browser/fileapi/syncable/syncable_file_system_unittest.cc
diff --git a/webkit/browser/fileapi/syncable/syncable_file_system_unittest.cc b/webkit/browser/fileapi/syncable/syncable_file_system_unittest.cc
index 824ae59f0868db3272917148aa0b01ea1e47b98d..11ae15a3a7ea9076557c44fc21347b2ee099ea28 100644
--- a/webkit/browser/fileapi/syncable/syncable_file_system_unittest.cc
+++ b/webkit/browser/fileapi/syncable/syncable_file_system_unittest.cc
@@ -14,6 +14,7 @@
 #include "webkit/browser/fileapi/syncable/canned_syncable_file_system.h"
 #include "webkit/browser/fileapi/syncable/local_file_change_tracker.h"
 #include "webkit/browser/fileapi/syncable/local_file_sync_context.h"
+#include "webkit/browser/fileapi/syncable/sync_file_system_backend.h"
 #include "webkit/browser/fileapi/syncable/syncable_file_system_util.h"
 #include "webkit/browser/quota/quota_manager.h"
 #include "webkit/common/fileapi/file_system_types.h"
@@ -88,7 +89,7 @@ class SyncableFileSystemTest : public testing::Test {
   }
 
   LocalFileChangeTracker* change_tracker() {
-    return file_system_context()->change_tracker();
+    return file_system_.backend()->change_tracker();
   }
 
   ScopedEnableSyncFSDirectoryOperation enable_directory_operation_;