[iOS] Use old GetFirstResponder implementation for iOS14

EG2 tests are spinning in a loop on iOS 14 simulators
when kFirstResponderSendAction is disabled.

This change will temporarily allow the egtests to run on the
bots.

Bug: 1103822
Change-Id: I1f3f4004495662037ce54b2ce57cb4aaed501f46
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2290552
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#787106}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: fe7066dfd4c88e51b9cadd8dfc9a95b425177d36
1 file changed