Adds support for the search key in the Virtual Keyboard.

ui/keyboard/resources/elements/kb-key-codes.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-codes">
 <script>
   (function() {
 
@@ skipping 103 matching lines @@
       'X': {keyCode: 0x58, shiftModifier: true},
       'y': {keyCode: 0x59, shiftModifier: false},
       'Y': {keyCode: 0x59, shiftModifier: true},
       'z': {keyCode: 0x5A, shiftModifier: false},
       'Z': {keyCode: 0x5A, shiftModifier: true},
       'Fullscreen': {keyCode: 0x7A, shiftModifier: false},
       'Shutdown': {keyCode: 0x98, shiftModifier: false},
       'Back': {keyCode: 0xA6, shiftModifier: false},
       'Forward': {keyCode: 0xA7, shiftModifier: false},
       'Reload': {keyCode: 0xA8, shiftModifier: false},
+      'Search': {keyCode: 0xAA, shiftModifier: false},
       'Mute': {keyCode: 0xAD, shiftModifier: false},
       'Volume-Down': {keyCode: 0xAE, shiftModifier: false},
       'Volume-Up': {keyCode: 0xAF, shiftModifier: false},
       'Change-Window': {keyCode: 0xB6, shiftModifier: false},
       ';': {keyCode: 0xBA, shiftModifier: false},
       ':': {keyCode: 0xBA, shiftModifier: true},
       '=': {keyCode: 0xBB, shiftModifier: false},
       '+': {keyCode: 0xBB, shiftModifier: true},
       ',': {keyCode: 0xBC, shiftModifier: false},
       '<': {keyCode: 0xBC, shiftModifier: true},
@@ skipping 78 matching lines @@
          type: type,
          charValue: char.charCodeAt(0),
          keyCode: keyCode,
          modifiers: modifiers
        };
      },
     });
   })();
 </script>
 </polymer-element>