Allow user to select text in Settings UI

chrome/browser/resources/settings/settings_ui/settings_ui.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
 <link rel="import" href="chrome://resources/cr_elements/cr_drawer/cr_drawer.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_toolbar/cr_toolbar.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/color.html">
 <link rel="import" href="../direction_delegate.html">
 <link rel="import" href="../global_scroll_target_behavior.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../icons.html">
 <link rel="import" href="../settings_main/settings_main.html">
 <link rel="import" href="../settings_menu/settings_menu.html">
 <link rel="import" href="../settings_shared_css.html">
 <link rel="import" href="../prefs/prefs.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_vars_css.html">
 
 <if expr="chromeos">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_onc_types.html">
 </if>
 
 <dom-module id="settings-ui">
   <template>
     <style include="settings-shared">
       :host {
         @apply(--layout-fit);
-        -webkit-user-select: none;
+        -webkit-user-select: text;
         color: var(--primary-text-color);
         display: flex;
         flex-direction: column;
         line-height: 154%; /* Apply 20px line-height to all texts by default. */
         overflow: hidden;  /* Prevent double scroll bar bugs. */
       }
 
       .drawer-header {
         outline: none;
       }
@@ skipping 73 matching lines @@
       <settings-main id="main" prefs="{{prefs}}"
           toolbar-spinner-active="{{toolbarSpinnerActive_}}"
           page-visibility="[[pageVisibility_]]"
           show-android-apps="[[showAndroidApps_]]"
           advanced-toggle-expanded="{{advancedOpened_}}">
       </settings-main>
     </div>
   </template>
   <script src="settings_ui.js"></script>
 </dom-module>