Fix labels' alignment in Files.app's files list.

chrome/browser/resources/file_manager/css/file_manager.css

 /* Copyright (c) 2012 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. */
 
 html {
   height: 100%;
 }
 
 html.col-resize * {
   cursor: col-resize !important;
@@ skipping 1022 matching lines @@
   top: -1px;
 }
 
 
 .preview-container .table-header {
   border-radius: 0 4px 0 0;
 }
 
 /* Text label in a table header. */
 .table-header-label {
-  margin: 5px 10px 0 9px;
+  line-height: 27px;
 }
 
 .table-row-cell > * {
   -webkit-box-align: center;
   -webkit-box-flex: 1;
   -webkit-box-orient: horizontal;
   margin: 0;
   padding: 0 10px;
 }
 
 .table-row-cell > .detail-name {
   display: -webkit-box;
 }
 
 .table-row-cell {
   -webkit-box-align: center;
 }
 
 .file-checkbox {
   -webkit-margin-end: 0;
   -webkit-margin-start: 0;
   position: relative;
   z-index: 2;
 }
 
 #select-all-checkbox {
-  -webkit-margin-end: 11px;
-  -webkit-margin-start: 1px;
+  -webkit-margin-end: 7px;
+  -webkit-margin-start: 2px;
   margin-bottom: 0;
   margin-top: 0;
-  /* 1px below text */
-  position: relative;
-  top: 1px;
+  vertical-align: middle;
 }
 
 #list-container li.table-row:hover .file-checkbox,
 #list-container li.table-row:hover .pin,
 #list-container li.thumbnail-item:hover .file-checkbox {
   opacity: 0.6;
 }
 
 #list-container li.table-row[selected] .file-checkbox,
 #list-container li.table-row[selected] .pin,
@@ skipping 539 matching lines @@
 
 #default-action-dialog {
   min-width: 300px;
   width: auto;
 }
 
 .drive-welcome-wrapper {
   /* drive_welcome.css will override it once loaded. */
   display: none;
 }