[BlobAsync] Moving async handling into BlobStorageContext & quota out.

storage/common/blob_storage/blob_storage_constants.cc

Index: storage/common/blob_storage/blob_storage_constants.cc
diff --git a/storage/common/blob_storage/blob_storage_constants.cc b/storage/common/blob_storage/blob_storage_constants.cc
index 0257117e3233ada5d027dbf3b808564e1c7b3294..2d825f4534b291080770be9ef75e3a864dcb9ced 100644
--- a/storage/common/blob_storage/blob_storage_constants.cc
+++ b/storage/common/blob_storage/blob_storage_constants.cc
@@ -12,6 +12,12 @@ bool BlobStatusIsError(BlobStatus status) {
   return static_cast<int>(status) <= static_cast<int>(BlobStatus::LAST_ERROR);
 }
 
+bool BlobStatusIsPending(BlobStatus status) {
+  int status_int = static_cast<int>(status);
+  return status_int >= static_cast<int>(BlobStatus::PENDING_QUOTA) &&
+         status_int <= static_cast<int>(BlobStatus::PENDING_INTERNALS);
+}
+
 bool BlobStatusIsBadIPC(BlobStatus status) {
   return status == BlobStatus::ERR_INVALID_CONSTRUCTION_ARGUMENTS;
 }