BUG ID: 4532113 REGRESSION (NativeTextField): Crash occurs after modifying field then reloading page -[FormDelegate frameLayoutHasChanged:]
STEPS TO TEST: 
-  enable Safari's auto fill
-  type something in the input field, and press enter to register it with autofill
-  clear the field and type part of the same string you did previously
-  without ever removing focus from the input field, select the suggestion autofill suggests
-  refresh the page or go to a bookmark (don't remove focus from the input field)
TEST PASS: 
no crash. 
TEST FAIL:  
Crash in -[FormDelegate frameLayoutHasChanged:]