[ew] Add basic classes.

chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.cc

Index: chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.cc
diff --git a/chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.cc b/chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.cc
index 31c72506085d3340bac5da8f5aa615672423ec01..596f7eadfb27d878626b5d98876cc6e73c7dd204 100644
--- a/chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.cc
+++ b/chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.cc
@@ -65,5 +65,11 @@ scoped_ptr<fileapi::FileStreamWriter> BackendDelegate::CreateFileStreamWriter(
       new FileStreamWriter(url, offset));
 }
 
+fileapi::WatcherManager* BackendDelegate::GetWatcherManager(
+    const fileapi::FileSystemURL& url) {
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
 }  // namespace file_system_provider
 }  // namespace chromeos