Use keys 1 through 3 to switch between and click on focusable elements.

chrome/browser/chromeos/accessibility/switch_access_event_handler.cc

Index: chrome/browser/chromeos/accessibility/switch_access_event_handler.cc
diff --git a/chrome/browser/chromeos/accessibility/switch_access_event_handler.cc b/chrome/browser/chromeos/accessibility/switch_access_event_handler.cc
index 25421569e22ca2ec03d544aefddb90cbe1372e81..a816e0efd5aef57df81e52a265812b7a9355e1f7 100644
--- a/chrome/browser/chromeos/accessibility/switch_access_event_handler.cc
+++ b/chrome/browser/chromeos/accessibility/switch_access_event_handler.cc
@@ -30,7 +30,9 @@ void SwitchAccessEventHandler::OnKeyEvent(ui::KeyEvent* event) {
   ui::KeyboardCode key_code = event->key_code();
   if (key_code == ui::VKEY_1 || key_code == ui::VKEY_2 ||
       key_code == ui::VKEY_3 || key_code == ui::VKEY_4 ||
-      key_code == ui::VKEY_5) {
+      key_code == ui::VKEY_5 || key_code == ui::VKEY_6 ||
+      key_code == ui::VKEY_7 || key_code == ui::VKEY_8 ||
+      key_code == ui::VKEY_9) {
     CancelEvent(event);
     LOG(ERROR) << "Dispatching key " << key_code - ui::VKEY_0

[David Tseng, 2017/03/10 18:09:22]

Remove debug logging or VLOG it; this will show up in release builds.

[elichtenberg, 2017/03/10 18:30:44]

Done.

                << " to switch access";