Make some additional adjustments to the v1 keyboard layout.

ui/keyboard/resources/main.css

 /*
  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.
 */
 
 body {
   -webkit-box-pack: center;
   -webkit-user-select: none;
   background-color: #0b0b0b;
@@ skipping 32 matching lines @@
   border-top: 2px solid #A9A9AF !important;
   /* Do not use box shadow until performance improves
    * http://code.google.com/p/chromium/issues/detail?id=99045
   box-shadow: 0px 0px 15px #fff;
   */
 }
 
 .at,
 .com,
 .comma,
-.hide,
-.mic,
 .period,
 .tab {
   -webkit-box-flex: 1.3 !important;
 }
 
 .return {
   -webkit-box-flex: 2.1 !important;
 }
 
+.mic {
+  -webkit-box-flex: 1.5 !important;
+}
+
 .symbol {
-  -webkit-box-flex: 1.5 !important;
+  -webkit-box-flex: 1.25 !important;
 }
 
 .backspace {
   -webkit-box-flex: 1.7 !important;
 }
 
 .left-shift,
 .left-more {
   -webkit-box-flex: 1.8 !important;
 }
 
 .right-shift,
 .right-more {
   -webkit-box-flex: 1.8 !important;
 }
 
 .space {
-  -webkit-box-flex: 4.8 !important;
+  -webkit-box-flex: 6.0 !important;
 }
 
 .bar {
   -webkit-box-flex: 0.6 !important;
 }
 
 .backspace,
 .dotcom,
 .left-more,
 .left-shift,
@@ skipping 10 matching lines @@
   background-image: url('images/mic.svg');
 }
 
 .audio .mic {
   background-image: url('images/mic-green.svg');
 }
 
 .hide {
   background-image: url('images/keyboard.svg');
 }