[MD settings] icons for clickable rows

chrome/browser/resources/settings/system_page/system_page.html

Index: chrome/browser/resources/settings/system_page/system_page.html
diff --git a/chrome/browser/resources/settings/system_page/system_page.html b/chrome/browser/resources/settings/system_page/system_page.html
index 530b7c60927163c0872a251cde047af49ced367c..28e5102d19990b7192e2a51b9d3a7ad55910a54f 100644
--- a/chrome/browser/resources/settings/system_page/system_page.html
+++ b/chrome/browser/resources/settings/system_page/system_page.html
@@ -1,5 +1,6 @@
 <link rel="import" href="chrome://resources/html/polymer.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-icon-button/paper-icon-button-light.html">
 <link rel="import" href="/controls/controlled_button.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/lifetime_browser_proxy.html">
@@ -37,11 +38,18 @@
         </template>
       </div>
     </div>
-    <div class="settings-box">
-      <controlled-button class="primary-button" pref="[[prefs.proxy]]"
-          on-tap="onChangeProxySettingsTap_">
+    <div class="settings-box two-line"  on-tap="onChangeProxySettingsTap_"
+        actionable>
+      <div class="start">
         $i18n{changeProxySettings}
+        <div class="secondary">$i18n{changeProxySettingsSubtext}</div>
+      </div>
+      <!-- TODO(dschuyler): This controlled-button should be replaced with
+           something that shows the controlled icon without being a button. -->
+      <controlled-button pref="[[prefs.proxy]]">
       </controlled-button>
+      <button class="icon-external" is="paper-icon-button-light">
+      </button>
     </div>
   </template>
   <script src="/system_page/system_page.js"></script>