[MD Bookmarks] Make info-text in the bookmark list unselectable.

chrome/browser/resources/md_bookmarks/list.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-list/iron-list.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/shadow.html">
 <link rel="import" href="chrome://bookmarks/command_manager.html">
 <link rel="import" href="chrome://bookmarks/item.html">
 <link rel="import" href="chrome://bookmarks/shared_style.html">
 <link rel="import" href="chrome://bookmarks/store_client.html">
 <link rel="import" href="chrome://bookmarks/util.html">
@@ skipping 11 matching lines @@
         @apply(--shadow-elevation-2dp);
         background-color: #fff;
         margin: 0 auto;
         max-width: var(--card-max-width);
         padding: 8px 0;
       }
 
       .centered-message {
         align-items: center;
         color: #6e6e6e;
+        cursor: default;
         display: flex;
         font-size: 14px;
         font-weight: 500;
         height: 100%;
         justify-content: center;
+        user-select: none;
       }
     </style>
     <iron-list items="[[displayedList_]]" id="bookmarksCard"
         hidden$="[[isEmptyList_(displayedList_.length)]]">
       <template>
         <bookmarks-item item-id="[[item.id]]" draggable="true"
             tabindex$="[[tabIndex]]" iron-list-tab-index="[[tabIndex]]">
         </bookmarks-item>
       </template>
     </iron-list>
     <div id="message" class="centered-message"
         hidden$="[[!isEmptyList_(displayedList_.length)]]">
       [[emptyListMessage_(searchTerm_)]]
     </div>
   </template>
   <script src="chrome://bookmarks/list.js"></script>
 </dom-module>