IndexedDB: Remove unused IDBCallbacks.SuccessArray method

Now that the IDBDatabase.GetAll method no longer uses the
IDBCallbacks.SuccessArray return method, this CL removes it.

Bug: 717812
Change-Id: Id91d074c6185932dbfb2e2cd404127e58e7804ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1623452
Commit-Queue: Chase Phillips <cmp@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662462}
5 files changed