IndexedDB: Update task type from kInternalIndexedDB to kDatabaseAccess

Following up on a review comment in https://crrev.com/c/1410171,
we think the right task type to use for IndexedDB tasks is actually
kDatabaseAccess.  Update all uses of kInternalIndexedDB to
kDatabaseAccess.

Bug: 717812
Change-Id: Icb7ed1bf2dfb3e2a6f86d1d08cb0d42a4bac7324
Reviewed-on: https://chromium-review.googlesource.com/c/1413792
Commit-Queue: Chase Phillips <cmp@chromium.org>
Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hajime Hoshi <hajimehoshi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#629624}
10 files changed