Cleanup: fix some CSS comment styles (especially copyrights)

chrome/browser/resources/options/chromeos/change_picture_options.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. */
 
 #user-images-area {
   display: -webkit-box;
 }
 
 #user-image-grid {
   -webkit-user-drag: none;
@@ skipping 25 matching lines @@
   display: inline-block;
   margin: 8px;
   padding: 3px;
 }
 
 #user-image-grid [selected] {
   border: 2px solid rgb(0, 102, 204);
   padding: 2px;
 }
 
-/**
- * #user-image-preview can have the following classes:
+/* #user-image-preview can have the following classes:
  * .default-image: one of the default images is selected (including the grey
  *                 silhouette);
  * .profile-image: profile image is selected;
  * .online: camera is streaming video;
  * .camera: camera (live or photo) is selected;
- * .live: camera is in live mode (no photo taken yet/last photo removed).
- */
+ * .live: camera is in live mode (no photo taken yet/last photo removed). */
 
 #user-image-preview {
   margin: 18px 10px 0 0;
   max-width: 220px;
   position: relative;
 }
 
 #user-image-preview .perspective-box {
   -webkit-perspective: 600px;
   border: solid 1px #cacaca;
@@ skipping 105 matching lines @@
 }
 
 #user-image-attribution {
   -webkit-padding-start: 34px;
   line-height: 26px;
 }
 
 #user-image-author-website {
   -webkit-padding-start: 5px;
 }