MD Settings: Remove usage of deprecated iron-flex-layout.html.

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

Index: chrome/browser/resources/settings/people_page/people_page.html
diff --git a/chrome/browser/resources/settings/people_page/people_page.html b/chrome/browser/resources/settings/people_page/people_page.html
index 8f7dbb5539d8b6ee9510c1f3c73ad0fae3ad1003..f149d72e01968e973322ca1c88dacce057cba960 100644
--- a/chrome/browser/resources/settings/people_page/people_page.html
+++ b/chrome/browser/resources/settings/people_page/people_page.html
@@ -7,6 +7,7 @@
 <link rel="import" href="chrome://resources/html/util.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/iron-flex-layout/iron-flex-layout-classes.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">
@@ -34,7 +35,7 @@
 
 <dom-module id="settings-people-page">
   <template>
-    <style include="settings-shared">
+    <style include="settings-shared iron-flex">
       setting-box.middle {
         /* Per spec, middle text is indented 20px in this section. */
         -webkit-margin-start: 20px;