[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 4c7ce8e2c1975076510e8ec4065ba7e7a02dac7e..99633194534e58ddb5c146d084d3c832ed722dc9 100644
--- a/storage/browser/blob/blob_reader.h
+++ b/storage/browser/blob/blob_reader.h
@@ -127,6 +127,9 @@ 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,
@@ -163,6 +166,7 @@ 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_;