MD Settings: Remove unnecessary scrollbar from Sign out dialog.

chrome/browser/resources/settings/people_page/people_page.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/people_page/sync_page.html">
 <link rel="import" href="/people_page/profile_info_browser_proxy.html">
@@ skipping 49 matching lines @@
         justify-content: center;
         width: 40px;
       }
 
       #googleg-logo {
         background-image: url(../../../../../ui/webui/resources/images/200-logo_googleg.png);
         background-size: cover;
         height: var(--iron-icon-height);
         width: var(--iron-icon-width);
       }
+
+      paper-checkbox {
+        margin: 16px 0 2px;
+      }
     </style>
     <settings-animated-pages id="pages" current-route="{{currentRoute}}"
         section="people">
       <neon-animatable id="main">
         <div class="settings-box first two-line">
           <img id="profile-icon" src="[[profileIconUrl_]]"
               on-tap="onPictureTap_" actionable>
           <div class="middle">
 <if expr="not chromeos">
             <span id="profile-name" on-tap="onProfileNameTap_" actionable>
@@ skipping 233 matching lines @@
 
 <if expr="chromeos">
     <template is="dom-if" if="[[easyUnlockEnabled_]]">
       <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog">
       </easy-unlock-turn-off-dialog>
     </template>
 </if>
   </template>
   <script src="people_page.js"></script>
 </dom-module>