DevTools: align combobox text with other controls

Source/devtools/front_end/ui/toolbar.css

 /*
  * Copyright (c) 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.
  */
 
 :host {
     flex: none;
     padding: 0 2px;
 }
@@ skipping 157 matching lines @@
 select.toolbar-item {
     min-width: 48px;
     color: rgb(48, 48, 48);
     text-shadow: rgba(255, 255, 255, 0.75) 0 1px 0;
     -webkit-appearance: none;
     border: 0;
     border-radius: 0;
     padding: 0 15px 0 5px;
     margin-right: -10px;
     position: relative;
-    line-height: 22px;
 }
 
 .toolbar-item.checkbox {
     padding: 0 5px 0 2px;
 }
 
 .toolbar-item > .glyph {
     -webkit-mask-image: url(Images/toolbarButtonGlyphs.png);
     -webkit-mask-size: 352px 144px;
     background-color: #5a5a5a;
@@ skipping 328 matching lines @@
 }
 
 .playback-rate-button.toggled-on > .toolbar-button-text {
     color: rgb(66, 129, 235);
 }
 
 button.playback-rate-button {
     width: auto;
     margin-right: 10px;
 }