[IndexedDB] Adding transaction and value support to observers

content/child/indexed_db/indexed_db_callbacks_impl.h

Index: content/child/indexed_db/indexed_db_callbacks_impl.h
diff --git a/content/child/indexed_db/indexed_db_callbacks_impl.h b/content/child/indexed_db/indexed_db_callbacks_impl.h
index 7b98c65f29700dc877f17195dd8e96980f4cdf49..6d695e73f9c1819c1faf187c59e7e244fbe1e94c 100644
--- a/content/child/indexed_db/indexed_db_callbacks_impl.h
+++ b/content/child/indexed_db/indexed_db_callbacks_impl.h
@@ -10,6 +10,7 @@
 
 namespace blink {
 class WebIDBCallbacks;
+struct WebIDBValue;
 }
 
 namespace content {
@@ -68,6 +69,9 @@ class IndexedDBCallbacksImpl : public indexed_db::mojom::Callbacks {
     DISALLOW_COPY_AND_ASSIGN(InternalState);
   };
 
+  static void ConvertValue(const indexed_db::mojom::ValuePtr& value,
+                           blink::WebIDBValue* web_value);
+
   IndexedDBCallbacksImpl(std::unique_ptr<blink::WebIDBCallbacks> callbacks,
                          int64_t transaction_id,
                          const base::WeakPtr<WebIDBCursorImpl>& cursor,