[IndexedDB] Refactoring to remove ref ptrs and host transaction ids.

content/browser/indexed_db/indexed_db_callbacks.h

Index: content/browser/indexed_db/indexed_db_callbacks.h
diff --git a/content/browser/indexed_db/indexed_db_callbacks.h b/content/browser/indexed_db/indexed_db_callbacks.h
index bf26a1d436bd4eb4e24d13230298046339bd3de6..1258db96b9079a33a72d764dfedca1c4ad7b004d 100644
--- a/content/browser/indexed_db/indexed_db_callbacks.h
+++ b/content/browser/indexed_db/indexed_db_callbacks.h
@@ -31,6 +31,7 @@ class IndexedDBDatabase;
 struct IndexedDBDataLossInfo;
 struct IndexedDBDatabaseMetadata;
 struct IndexedDBReturnValue;
+class IndexedDBTransaction;
 struct IndexedDBValue;
 
 class CONTENT_EXPORT IndexedDBCallbacks
@@ -53,13 +54,14 @@ class CONTENT_EXPORT IndexedDBCallbacks
   virtual void OnUpgradeNeeded(
       int64_t old_version,
       std::unique_ptr<IndexedDBConnection> connection,
+      IndexedDBTransaction* transaction,
       const content::IndexedDBDatabaseMetadata& metadata,
       const IndexedDBDataLossInfo& data_loss_info);
   virtual void OnSuccess(std::unique_ptr<IndexedDBConnection> connection,
                          const content::IndexedDBDatabaseMetadata& metadata);
 
   // IndexedDBDatabase::OpenCursor
-  virtual void OnSuccess(scoped_refptr<IndexedDBCursor> cursor,
+  virtual void OnSuccess(std::unique_ptr<IndexedDBCursor> cursor,
                          const IndexedDBKey& key,
                          const IndexedDBKey& primary_key,
                          IndexedDBValue* value);