Destroy (Password)AutofillAgent safely
Therefore this CL postpones deletion by sending a DeleteSoon task on the frame destruction. The CL also changes a couple of places relying on render frame being alive if the observer is alive to handle a null frame gratefully.
(cherry picked from commit d62bc3e6e2c3be6bbb01fa325e3389f089974017)
Review URL: https://codereview.chromium.org/1960023002 .
7 files changed