Removed webdatabase/BUILD.gn references to deleted headers.

In February a number of obsolete header files were deleted but
some of them were still listed in sources lists. That might have
caused isolate step errors in trybots.

Bug: 778580
Change-Id: Ica026a5d157c64f07465f520a15ed2ffab92c234
Reviewed-on: https://chromium-review.googlesource.com/c/1286428
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#600492}
1 file changed