[BlobAsync] Asynchronous Blob Construction Final Patch

storage/common/blob_storage/blob_storage_constants.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef STORAGE_COMMON_BLOB_STORAGE_BLOB_STORAGE_CONSTANTS_H_
 #define STORAGE_COMMON_BLOB_STORAGE_BLOB_STORAGE_CONSTANTS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 14 matching lines @@
   IPC,
   SHARED_MEMORY,
   FILE,
   LAST = FILE
 };
 
 enum class IPCBlobCreationCancelCode {
   UNKNOWN = 0,
   OUT_OF_MEMORY,
   FILE_WRITE_FAILED,
-  LAST = FILE_WRITE_FAILED
+  // The renderer was destroyed while data was in transit.
+  SOURCE_DIED_IN_TRANSIT,
+  // The renderer destructed the blob before it was done trasfering, and there
+  // were no outstanding references (no one is waiting to read) to keep the
+  // blob alive.
+  BLOB_DEREFERENCED_WHILE_BUILDING,
+  // A blob that we we referenced during construction is broken, or an
+  // internal tries to build a blob with a blob reference that isn't finished
+  // constructing.
+  REFERENCED_BLOB_BROKEN,
+  LAST = REFERENCED_BLOB_BROKEN
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_COMMON_BLOB_STORAGE_BLOB_STORAGE_CONSTANTS_H_