Update WebAuthn two error strings.

Replace "We couldn't verify your identity on this device" with the
string “Your identity couldn’t be verified”.

Bug: 887390
Change-Id: I4e2885f68964a2706f58a27a3dba3dbe412bbcf3
Reviewed-on: https://chromium-review.googlesource.com/1236002Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Jun Choi <hongjunchoi@chromium.org>
Commit-Queue: Balazs Engedy <engedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592911}

chrome/app/generated_resources.grd

@@ -9149,10 +9149,10 @@ Please help our engineers fix this problem. Tell us what happened right before y
         Something went wrong
       </message>
       <message name="IDS_WEBAUTHN_ERROR_INTERNAL_UNRECOGNIZED_DESCRIPTION" desc="Description in the dialog shown when the user's could not sign in to a web site using a hardware-based authentication mechanism built in to the computer (e.g. a fingerprint reader), because they never registered the device with this website before.">
-        We couldn't verify your identity on this device
+        Your identity couldn't be verified
       </message>
       <message name="IDS_WEBAUTHN_ERROR_NO_TRANSPORTS_TITLE" desc="Title of the dialog shown when the user could not sign in to a web site, because their computer did not support any of the hardware-based authentication mechanisms desired by the web site.">
-        We couldn't verify your identity on this device
+        Your identity couldn't be verified
       </message>
       <message name="IDS_WEBAUTHN_ERROR_NO_TRANSPORTS_DESCRIPTION" desc="Description in the dialog shown when the user could not sign in to a web site, because their computer did not support any of the hardware-based authentication mechanisms desired by the web site.">
         This device doesn't support the type of security key requested by this website