Add initial VR interactive omnibox.

chrome/browser/resources/vr_shell/vk.js

 vk_l_panel_layout = [
   [
     { "code": "Key1", "key": "1" },
     { "code": "Key2", "key": "2" },
     { "code": "Key3", "key": "3" },
   ],
   [
     { "code": "Key4", "key": "4" },
     { "code": "Key5", "key": "5" },
     { "code": "Key6", "key": "6" },
@@ skipping 198 matching lines @@
 }
 
 function vk_level0(button) {
   vk_ch(button);
   vk_activate_level(0);
 }
 
 function vk_ch(button) {
   if (button.key || button.code) {
     console.log('Keyboard click: ' + performance.now());
-    // Hack!  Set focus back to omnibox.  Oh man...
-    let field = document.querySelector("#input-field");
-    field.focus();;
+    document.querySelector("#omnibox-input-field").focus();
     sendKey('key', button.code, button.key);
     if (vk_state.level == 1)
       vk_activate_level(0);
     console.log('Done keyboard click: ' + performance.now());
   }
 }
 
 function vk_ignore(button) {
 }
 
@@ skipping 248 matching lines @@
     charValue: ch,
     keyCode: vk,
     keyName: code,
     modifiers: modifiers
   };
       //chrome.virtualKeyboardPrivate.sendKeyEvent(event, logIfError_);
   console.log('KEY: t: ' + type + ' ch: ' +ch + ' kc: ' + vk +' kn: '+ code+ ' m: ' + modifiers);
   api.doAction(api.Action.KEY_EVENT, event);
 }