Fire window.onerror for uncaught IndexedDB errors

LayoutTests/storage/indexeddb/version-change-abort-expected.txt

-CONSOLE ERROR: line 52: Uncaught Error: This should *NOT* be caught!
+CONSOLE ERROR: line 58: Uncaught Error: This should not be caught
+CONSOLE ERROR: line 1: AbortError: Version change transaction was aborted in upgradeneeded event handler.
 Ensure that aborted VERSION_CHANGE transactions are completely rolled back
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
 dbname = "version-change-abort.html"
 indexedDB.deleteDatabase(dbname)
 indexedDB.open(dbname)
 PASS trans instanceof IDBTransaction is true
-store = db.createObjectStore('store1')
-setVersion1 complete
+db.createObjectStore('store1')
+openRequest1 complete
 PASS db.version is 1
 
 vcreq = indexedDB.open(dbname, 2)
-setVersion2() callback
+openRequest2() callback
 PASS db.version is 2
 PASS vcreq.transaction instanceof IDBTransaction is true
-store = db.deleteObjectStore('store1')
-store = db.createObjectStore('store2')
+db.deleteObjectStore('store1')
+db.createObjectStore('store2')
 raising exception
+PASS Got expected error: 'Uncaught Error: This should not be caught'
+PASS sawGlobalErrorUncaughtException is true
 
-setVersion2Abort() callback
+openRequest2Error() callback
+PASS sawGlobalErrorUncaughtException is true
+PASS sawTransactionAbort is true
+PASS Got expected error: 'AbortError: Version change transaction was aborted in upgradeneeded event handler.'
+
+Verify rollback:
 request = indexedDB.open(dbname)
 PASS db.version is 1
 PASS db.objectStoreNames.contains('store1') is true
 PASS db.objectStoreNames.contains('store2') is false
 PASS successfullyParsed is true
 
 TEST COMPLETE