[BlobStorage] Implementing disk.

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 f54d20aaa701aab134152616d7699c1aea04dd93..aa9ba4e4ebfaae2f0ac86846c4cb563e58571690 100644
--- a/storage/common/blob_storage/blob_storage_constants.h
+++ b/storage/common/blob_storage/blob_storage_constants.h
@@ -73,12 +73,13 @@ enum class BlobStatus {
   // Blob state section:
   // The blob has finished.
   DONE = 200,
-  // The system is pending on quota being granted, the transport layer
-  // populating pending data, and/or copying data from dependent blobs. See
-  // BlobEntry::BuildingState determine which of these are happening, as they
-  // all can happen concurrently.
+  // Waiting for memory or file quota for the to-be transported data.
   PENDING_QUOTA = 201,
+  // Waiting for data to be transported (quota has been granted).
   PENDING_TRANSPORT = 202,
+  // Waiting for any operations involving dependent blobs after transport data
+  // has been populated. See BlobEntry::BuildingState for more info.
+  // TODO(dmurph): Change to PENDING_REFERENCED_BLOBS (crbug.com/670398).
   PENDING_INTERNALS = 203,
   LAST = PENDING_INTERNALS
 };