IndexedDB: Replace use of DOMError with DOMException

DOMError has been removed from the DOM standard in favor of
DOMException, and the Indexed DB draft spec has been updated
to use DOMException for error attributes.

Intent: https://groups.google.com/a/chromium.org/d/msg/blink-dev/XAlBg66UB7c/G4GNCFLnwCQJ
Editor's Draft: https://w3c.github.io/IndexedDB/
R=philipj@opera.com
BUG=460725

Review URL: https://codereview.chromium.org/1364823002

Cr-Commit-Position: refs/heads/master@{#358389}
17 files changed