Compile ui/keyboard/ JS, part 1: remove all warnings

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

 // Copyright 2014 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.
 
 /**
  * The long-press delay in milliseconds before long-press handler is
  * invoked.
  * @const
  * @type {number}
  */
@@ skipping 154 matching lines @@
    * 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;
   },
 
   /**
    * Handles a swipe flick that originated from this key.
-   * @param {detail} The details of the swipe.
+   * @param {detail} detail The details of the swipe.
    */
   onFlick: function(detail) {
     if (!(detail.direction & SwipeDirection.UP) || !this.hintTextValue)
       return;
     var typeDetails = {char: this.hintTextValue};
     this.fire('type-key', typeDetails);
   },
 
   /**
    * Returns a subset of the key attributes.
@@ skipping 33 matching lines @@
         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);
   },
 });