Add a full QWERTY layout.

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

 <!--
   -- Copyright 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.
   -->
 
 <polymer-element name="kb-key-base"
     on-pointerdown="down" on-pointerup="up" on-pointerout="out"
     attributes="accents char invert repeat hintText toKeyset toLayout">
   <script>
@@ skipping 120 matching lines @@
         this.fire('key-up', detail);
       },
 
       /**
        * Character value associated with the key. Typically, the value is a
        * single character, but may be multi-character in cases like a ".com"
        * button.
        * @return {string}
        */
       get charValue() {
-        return this.invert? this.hintText : (this.char || this.textContent);
+        return this.invert ? this.hintText : (this.char || this.textContent);
       },
 
       /* Hint text value associated with the key. Typically, the value is a
        * single character.
        * @return {string}
        */
       get hintTextValue() {
-        return this.invert? (this.char || this.textContent) : this.hintText;
+        return this.invert ? (this.char || this.textContent) : this.hintText;
       },
 
       populateDetails: function() {
          return {
             char: this.charValue,
             toLayout: this.toLayout,
             repeat: this.repeat
          };
       },
 
       generateLongPressTimer: function() {
         return this.asyncMethod(function() {
           var detail = {
             char: this.charValue,
             hintText: this.hintTextValue
           };
           if (this.keysetRules && this.keysetRules.long != undefined) {
             detail.toKeyset = this.keysetRules.long[TO_KEYSET - OFFSET];
             detail.nextKeyset = this.keysetRules.long[NEXT_KEYSET - OFFSET];
           }
           this.fire('key-longpress', detail);
         }, null, LONGPRESS_DELAY_MSEC);
       },
     });
   </script>
 </polymer-element>