Revert of [Blob] Fix for resetting reader.

content/browser/loader/upload_data_stream_builder.cc

Index: content/browser/loader/upload_data_stream_builder.cc
diff --git a/content/browser/loader/upload_data_stream_builder.cc b/content/browser/loader/upload_data_stream_builder.cc
index 981d9734e9b66c868bb0a118636f76e5dfe46735..7f6b517b393aa6f9e49423e01e304bb695b8d722 100644
--- a/content/browser/loader/upload_data_stream_builder.cc
+++ b/content/browser/loader/upload_data_stream_builder.cc
@@ -102,9 +102,11 @@
         DCHECK_EQ(0ul, element.offset());
         scoped_ptr<storage::BlobDataHandle> handle =
             blob_context->GetBlobDataFromUUID(element.blob_uuid());
+        storage::BlobDataHandle* handle_ptr = handle.get();
         element_readers.push_back(
             make_scoped_ptr(new storage::UploadBlobElementReader(
-                std::move(handle), file_system_context, file_task_runner)));
+                handle_ptr->CreateReader(file_system_context, file_task_runner),
+                std::move(handle))));
         break;
       }
       case ResourceRequestBody::Element::TYPE_DISK_CACHE_ENTRY: