[Bluetooth] Correctly prompt user to enter passkey during keyboard pairing.

The dialog was incorrectly displaying "Connecting to..." when
the keyboard supported and provided "keys entered" events.
We should always continue to prompt the user to enter the passkey
as they enter the passkey.

Bug: 1007375
Change-Id: Ia5cf9d226fe17d902e01aaa24f642a1dab635af6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1875382
Commit-Queue: Ryan Hansberry <hansberry@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709307}

chrome/browser/ui/webui/chromeos/bluetooth_dialog_localized_strings_provider.cc

@@ -23,12 +23,16 @@ void AddLocalizedStrings(content::WebUIDataSource* html_source) {
       // Device connecting and pairing.
       // These ids are generated in JS using 'bluetooth_' + a value from
       // bluetoothPrivate.PairingEventType (see bluetooth_private.idl).
-      // 'keysEntered', and 'requestAuthorization' have no associated message.
+      // 'requestAuthorization' has no associated message.
       {"bluetooth_requestPincode", IDS_SETTINGS_BLUETOOTH_REQUEST_PINCODE},
       {"bluetooth_displayPincode", IDS_SETTINGS_BLUETOOTH_DISPLAY_PINCODE},
       {"bluetooth_requestPasskey", IDS_SETTINGS_BLUETOOTH_REQUEST_PASSKEY},
       {"bluetooth_displayPasskey", IDS_SETTINGS_BLUETOOTH_DISPLAY_PASSKEY},
       {"bluetooth_confirmPasskey", IDS_SETTINGS_BLUETOOTH_CONFIRM_PASSKEY},
+      // Also display the IDS_SETTINGS_BLUETOOTH_DISPLAY_PASSKEY for the
+      // 'keysEntered' event: continue prompting the user to enter the passkey
+      // as they continue to enter its keys.
+      {"bluetooth_keysEntered", IDS_SETTINGS_BLUETOOTH_DISPLAY_PASSKEY},
       // These ids are generated in JS using 'bluetooth_connect_' + a value from
       // bluetoothPrivate.ConnectResultType (see bluetooth_private.idl).
       {"bluetooth_connect_attributeLengthInvalid",

ui/webui/resources/cr_components/chromeos/bluetooth_dialog.js

@@ -478,7 +478,6 @@ Polymer({
   getEventDesc_: function(eventType) {
     assert(eventType);
     if (eventType == PairingEventType.COMPLETE ||
-        eventType == PairingEventType.KEYS_ENTERED ||
         eventType == PairingEventType.REQUEST_AUTHORIZATION) {
       return 'bluetoothStartConnecting';
     }