IndexedDB: Fixed support for empty blobs.

storage/browser/fileapi/file_stream_writer.h

Index: storage/browser/fileapi/file_stream_writer.h
diff --git a/storage/browser/fileapi/file_stream_writer.h b/storage/browser/fileapi/file_stream_writer.h
index cc191dc9fc3c10f8d4dfc3e94b613d4cb0a5b171..9a9824ca93e2d2e745143eca4d0837a05eccbe00 100644
--- a/storage/browser/fileapi/file_stream_writer.h
+++ b/storage/browser/fileapi/file_stream_writer.h
@@ -23,15 +23,12 @@ namespace storage {
 // A generic interface for writing to a file-like object.
 class FileStreamWriter {
  public:
-  enum OpenOrCreate { OPEN_EXISTING_FILE, CREATE_NEW_FILE };
-
   // Creates a writer for the existing file in the path |file_path| starting
   // from |initial_offset|. Uses |task_runner| for async file operations.
   STORAGE_EXPORT static FileStreamWriter* CreateForLocalFile(
       base::TaskRunner* task_runner,
       const base::FilePath& file_path,
-      int64 initial_offset,
-      OpenOrCreate open_or_create);
+      int64 initial_offset);
 
   // Closes the file. If there's an in-flight operation, it is canceled (i.e.,
   // the callback function associated with the operation is not called).