[BlobAsync] Asynchronous Blob Construction Final Patch

storage/browser/blob/blob_reader.h

Index: storage/browser/blob/blob_reader.h
diff --git a/storage/browser/blob/blob_reader.h b/storage/browser/blob/blob_reader.h
index 54b262f3ef3e910dfcf932c37a87d8b9e85ab8b7..db7f41da093a7cc9880c320d0ae44a85f9481053 100644
--- a/storage/browser/blob/blob_reader.h
+++ b/storage/browser/blob/blob_reader.h
@@ -123,6 +123,9 @@ class STORAGE_EXPORT BlobReader {
   Status ReportError(int net_error);
   void InvalidateCallbacksAndDone(int net_error, net::CompletionCallback done);
 
+  void AsyncCalculateSize(const net::CompletionCallback& done,
+                          bool async_succeeded);
+  Status CalculateSizeImpl(const net::CompletionCallback& done);
   bool AddItemLength(size_t index, uint64_t length);
   bool ResolveFileItemLength(const BlobDataItem& item,
                              int64_t total_length,
@@ -159,6 +162,7 @@ class STORAGE_EXPORT BlobReader {
       const BlobDataItem& item,
       uint64_t additional_offset);
 
+  scoped_ptr<BlobDataHandle> blob_handle_;
   scoped_ptr<BlobDataSnapshot> blob_data_;
   scoped_ptr<FileStreamReaderProvider> file_stream_provider_;
   scoped_refptr<base::SequencedTaskRunner> file_task_runner_;