[ew] Add basic classes.

chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.cc

Index: chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.cc
diff --git a/chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.cc b/chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.cc
index 9e7cfe4492eedb020e31aa0f44b4c29ba3cb0b3a..a0867f3b8aaa8289999a2f0c196f29f29d7ceee5 100644
--- a/chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.cc
+++ b/chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.cc
@@ -73,7 +73,15 @@ FileSystemBackendDelegate::CreateFileStreamWriter(
   return scoped_ptr<fileapi::FileStreamWriter>(
       new internal::WebkitFileStreamWriterImpl(
           base::Bind(&fileapi_internal::GetFileSystemFromUrl, url),
-          context->default_file_task_runner(),file_path, offset));
+          context->default_file_task_runner(),
+          file_path,
+          offset));
+}
+
+fileapi::WatcherManager* FileSystemBackendDelegate::GetWatcherManager(
+    const fileapi::FileSystemURL& url) {
+  NOTIMPLEMENTED();
+  return NULL;
 }
 
 }  // namespace drive