[IndexedDB] Adding transaction and value support to observers

content/browser/indexed_db/indexed_db_database.h

Index: content/browser/indexed_db/indexed_db_database.h
diff --git a/content/browser/indexed_db/indexed_db_database.h b/content/browser/indexed_db/indexed_db_database.h
index df26126e5ca8345dffb835ff1180237c6f1d7bb6..ef6aaff22d601797ece79bd4873cc4dcf1e185a3 100644
--- a/content/browser/indexed_db/indexed_db_database.h
+++ b/content/browser/indexed_db/indexed_db_database.h
@@ -142,7 +142,8 @@ class CONTENT_EXPORT IndexedDBDatabase
   void FilterObservation(IndexedDBTransaction*,
                          int64_t object_store_id,
                          blink::WebIDBOperationType type,
-                         const IndexedDBKeyRange& key_range);
+                         const IndexedDBKeyRange& key_range,
+                         IndexedDBValue* value);

[cmumford, 2017/01/09 21:31:25]

Value isn't modified, so make it const. Also, add a comment above to explain
that a null value is allowed.

[dmurph, 2017/01/10 00:17:39]

Done.

   void SendObservations(
       std::map<int32_t, ::indexed_db::mojom::ObserverChangesPtr> change_map);