[BlobAsync] Asynchronous Blob Construction Final Patch

storage/common/blob_storage/blob_storage_constants.h

Index: storage/common/blob_storage/blob_storage_constants.h
diff --git a/storage/common/blob_storage/blob_storage_constants.h b/storage/common/blob_storage/blob_storage_constants.h
index e77c8683527875b420adb80fd0b87b357b276dce..d0e1d30a452355d6be1406f4e8e145cfd8817099 100644
--- a/storage/common/blob_storage/blob_storage_constants.h
+++ b/storage/common/blob_storage/blob_storage_constants.h
@@ -32,7 +32,17 @@ 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