MD Settings: Increase content width from 640px to 680px.

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

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/icon.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/iron-collapse/iron-collapse.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">
@@ skipping 67 matching lines @@
 
       .icon-container {
         display: flex;
         flex-shrink: 0;
         justify-content: center;
         width: 40px;
       }
 
       /* Avoid orphaned english text (as requested by bettes@) */
       #activity-controls .secondary {
-        max-width: 97%;
+        max-width: 90%;
       }
 
       #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);
       }
 
       #disconnectDialog .footer .settings-box {
@@ skipping 318 matching lines @@
 <if expr="chromeos">
     <template is="dom-if" if="[[showEasyUnlockTurnOffDialog_]]">
       <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog"
           on-close="onEasyUnlockTurnOffDialogClose_">
       </easy-unlock-turn-off-dialog>
     </template>
 </if>
   </template>
   <script src="people_page.js"></script>
 </dom-module>