Change checkIfSuggestionsAvailableForForm to return YES for password fields when form matched.

Bug: 865114
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: Idf883678744f87a7d431154608242d0ed0ec7e91
Reviewed-on: https://chromium-review.googlesource.com/c/1288309
Reviewed-by: Hiroshi Ichikawa <ichikawa@chromium.org>
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Reviewed-by: John Wu <jzw@chromium.org>
Commit-Queue: Scott Wu <scottwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601017}
4 files changed