App Version: 65.0.3295.0 canary
iOS Version: 11.2
Device: iPhoneX only
URL: na

Steps to reproduce:
  1. Launch Google Chrome in landscape mode
  2. Tap Omnibox to focus, type some text
  3. Dismiss the keyboard by swiping on the Omnibox suggestions
  4. Rotate the device to portrait mode

Observed results: Observe that top border is displayed on Omnibox

Expected results: Top border should not be displayed.

Note: This is a slight variation of http://crbug/789151 which was fixed in M64

Number of times you were able to reproduce: 5/5
Bug reproducible after clean install: Yes
Bug reproducible after clearing cache and cookies: Yes
Bug reproducible on Chrome Mobile on Android: NA
Bug reproducible on Safari/Firefox: Firefox: NA, Safari: NA
Bug reproducible on current stable build (App Version, iOS Version): M63 NO (http://crbug/785482)
Bug reproducible on the current beta channel build (App Version, iOS Version): M64 YES

Link to video/image: https://drive.google.com/file/d/1g4ssCH4pBE3jXJ1yd1gwCYrSkEaAxePF/view