add --guest

Author: ianjennings

testdriver/lifecycle/prerun.yaml

@@ -6,13 +6,13 @@ steps:
       - command: exec
         lang: shell
         linux: |
-          jumpapp google-chrome --disable-fre --no-default-browser-check --no-first-run "${TD_WEBSITE}" &
+          jumpapp google-chrome --disable-fre --no-default-browser-check --no-first-run --guest "${TD_WEBSITE}" &
           exit
         mac: |
-          open -na "Google Chrome" --args --disable-fre --no-default-browser-check --no-first-run --disable-features=PasswordManagerEnabled "${TD_WEBSITE}" &
+          open -na "Google Chrome" --args --disable-fre --no-default-browser-check --no-first-run --guest --disable-features=PasswordManagerEnabled "${TD_WEBSITE}" &
           exit
         windows:
-          Start-Process "C:/Program Files/Google/Chrome/Application/chrome.exe" -ArgumentList "--start-maximized", "${TD_WEBSITE}"
+          Start-Process "C:/Program Files/Google/Chrome/Application/chrome.exe" -ArgumentList "--start-maximized", "--guest" "${TD_WEBSITE}"
           exit
       - command: wait-for-text
         text: "Google Chrome"