Chrome Version: 71.0.3578.98
OS: MacOS 10.14

Have some entry in autocomplete like chromium.org
(note that this example is silly but on other strings it is an issue).

What steps will reproduce the problem?
(1) start typing chr and make sure autocomplete complete with chromium.org
(2) longpress o
(3) select ô
(4) the ô replace the o of chromium, and the omnibox is chrômium.org
(5) any characters entered after this are inserted between the ô and m

What is the expected result?
the end of the url should be deleted


What happens instead?
the end of the url stays at the end of the omnibox string.


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If this is a regression (i.e., worked before), please consider using
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