Have toDOMStringList() use the V8TRYCATCH_FOR_V8STRINGRESOURCE() macro

LayoutTests/storage/indexeddb/transaction-error-expected.txt

Index: LayoutTests/storage/indexeddb/transaction-error-expected.txt
diff --git a/LayoutTests/storage/indexeddb/transaction-error-expected.txt b/LayoutTests/storage/indexeddb/transaction-error-expected.txt
index c3f94938aea19c2019c4f246303a03a2072b5aef..825c07e783083db46b49fad65679cb0936c39594 100644
--- a/LayoutTests/storage/indexeddb/transaction-error-expected.txt
+++ b/LayoutTests/storage/indexeddb/transaction-error-expected.txt
@@ -1,4 +1,4 @@
-CONSOLE MESSAGE: line 73: Uncaught Error: This should *NOT* be caught!
+CONSOLE MESSAGE: line 78: Uncaught Error: This should *NOT* be caught!
 Test IDBTransaction.error cases.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
@@ -17,6 +17,9 @@ trans = db.transaction('storeName')
 IDBTransaction.error should be null if transaction is not finished:
 PASS trans.error is null
 
+transaction() should throw if one of the DOMStringList items cannot be converted to a String:
+PASS db.transaction(['storeName', nonConvertibleToString]) threw exception Exception in toString().
+
 If IDBTransaction.abort() is explicitly called, IDBTransaction.error should be null:
 trans.abort()
 PASS trans.error is null