GitLab

The event handler resets the iframe's AutofillHandler. This ensures that
unique renderer IDs are actually unique within AutofillHandler and
avoids false positive cache hits in the FormStructure cache.

Specifically, this concerns the FormRendererId for synthetic forms.
Without resetting the AutofillHandler, a pre-navigation synthetic
form cache entry persists and leads to false positives.

Bug: 1064709
Change-Id: Iface6ded3027c7b31322685122f2ea1fc8427607
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2120721
Commit-Queue: Christoph Schwering <schwering@google.com>
Reviewed-by: Vadym Doroshenko  <dvadym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776929}