Insert text directly from the virtual keyboard.

ui/keyboard/resources/elements/kb-keyboard.html

 <!--
   -- Copyright (c) 2013 The Chromium Authors. All rights reserved.
   -- Use of this source code is governed by a BSD-style license that can be
   -- found in the LICENSE file.
   -->
 
 <element name="kb-keyboard" on-key-over="keyOver" on-key-up="keyUp"
     on-key-down="keyDown" attributes="keyset rows">
   <template>
     <content select="#{{keyset}}"></content>
@@ skipping 77 matching lines @@
        * @param {Object} detail The detail of pressed kb-key.
        */
       keyDown: function(event, detail) {
         var toKeyset = detail.toKeyset;
         if (this.lastPressedKey)
           this.lastPressedKey.classList.remove('active');
         this.lastPressedKey = event.target;
         this.lastPressedKey.classList.add('active');
         repeatKey.cancel();
         if (detail.repeat) {
-          sendKey(detail.char);
+          insertText(detail.char);
           repeatKey.key = this.lastPressedKey;
           repeatKey.timer = setTimeout(function() {
             repeatKey.timer = undefined;
             repeatKey.interval = setInterval(function() {
-               sendKey(detail.char);
+               insertText(detail.char);
             }, REPEAT_INTERVAL_MSEC);
           }, Math.max(0, REPEAT_DELAY_MSEC - REPEAT_INTERVAL_MSEC));
         }
       },
 
       /**
        * Handles key-up event that is sent by kb-key.
        * @param {CustomEvent} event The key-up event dispatched by kb-key.
        * @param {Object} detail The detail of pressed kb-key.
        */
       keyUp: function(event, detail) {
         this.lastPressedKey.classList.remove('active');
         if (this.lastPressedKey != event.target)
           return;
         if (repeatKey.key == event.target) {
           repeatKey.cancel();
           return;
         }
         var toKeyset = detail.toKeyset;
         // Keyset transtion key.
         if (toKeyset) {
           this.keyset = toKeyset;
         }
         var char = detail.char;
         if (enterUpperOnSpace) {
           enterUpperOnSpace = false;
-          if (char == 'Spacebar')
+          if (char == ' ')
             this.keyset = 'upper';
         }
         switch(char) {
           case 'Invalid':
             return;
           case 'Mic':
             this.voiceInput_.onDown();
             return;
           case '.':
           case '?':
           case '!':
             enterUpperOnSpace = true;
             break;
-          case 'Tab':
-          case 'Spacebar':
-          case 'Enter':
-            sendKey(char);
-            return;
           default:
             break;
         }
-        for (var i = 0; i < char.length; i++) {
-          sendKey(char.charAt(i));
-        }
+        insertText(char);
       }
     });
   </script>
 </element>