[MD settings] advanced toggle; add scrollWhenReady

chrome/browser/resources/settings/settings_main/settings_main.html

 <link rel="import" href="chrome://resources/html/polymer.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="/about_page/about_page.html">
 <link rel="import" href="/advanced_page/advanced_page.html">
 <link rel="import" href="/basic_page/basic_page.html">
 <link rel="import" href="/settings_page/main_page_behavior.html">
 
 <dom-module id="settings-main">
   <template>
       <style>
         #advancedToggle {
           align-items: center;
           display: flex;
+          margin-bottom: 24px;
+          margin-top: 12px;  /* Part of a 48px spacer (33px + 12px + 3px). */
           min-height: 32px;
-          padding: 0 12px;  /* TODO(dschuyler): get real value. */
-        }
-
-        #pageContainer {
-          box-sizing: border-box;
-          overflow: auto;
-          padding: 0 16px;
+          padding: 0 12px;
         }
 
         #toggleContainer {
           align-items: center;
           display: flex;
           justify-content: center;
-          min-height: 80px;  /* TODO(dschuyler): get real value. */
+          margin-bottom: -var(--settings-page-vertical-margin);
+        }
+
+        #toggleSpacer {
+          padding-top: 33px;  /* Part of a 48px spacer (33px + 12px + 3px). */
+        }
+
+        iron-icon {
+          -webkit-margin-start: 16px;
         }
       </style>
     <content select="paper-icon-button"></content>
-    <div id="pageContainer">
-      <template is="dom-if" if="[[showBasicPage_]]">
-        <settings-basic-page prefs="{{prefs}}" current-route="{{currentRoute}}">
-        </settings-basic-page>
-      </template>
-      <template is="dom-if" if="[[showAdvancedToggle_]]">
-        <div id="toggleContainer">
-          <div id="advancedToggle" on-tap="toggleAdvancedPage_">
-            $i18n{advancedPageTitle}
-            <!-- TODO(dschuyler): menu icons (up arrow/down arrow) -->
-          </div>
+    <template is="dom-if" if="[[showBasicPage_]]">
+      <settings-basic-page prefs="{{prefs}}" current-route="{{currentRoute}}">
+      </settings-basic-page>
+    </template>
+    <template is="dom-if" if="[[showAdvancedToggle_]]">
+      <div id="toggleSpacer">
+      </div>
+      <div id="toggleContainer">
+        <div id="advancedToggle" on-tap="toggleAdvancedPage_">
+          <span>$i18n{advancedPageTitle}</span>
+          <iron-icon icon="[[arrowState_(showAdvancedPage_)]]"></iron-icon>

[michaelpg, 2016/06/13 21:11:22]

import:
chrome://resources/cr_elements/icons.html
/icons.html

[dschuyler, 2016/06/13 21:44:50]

Done.

         </div>
-      </template>
-      <template is="dom-if" if="[[showAdvancedPage_]]">
-        <settings-advanced-page prefs="{{prefs}}"
-            current-route="{{currentRoute}}">
-        </settings-advanced-page>
-      </template>
-      <template is="dom-if" if="[[showAboutPage_]]">
-        <settings-about-page current-route="{{currentRoute}}">
-        </settings-about-page>
-      </template>
-    </div>
+      </div>
+    </template>
+    <template is="dom-if" if="[[showAdvancedPage_]]">
+      <settings-advanced-page prefs="{{prefs}}"
+          current-route="{{currentRoute}}">
+      </settings-advanced-page>
+    </template>
+    <template is="dom-if" if="[[showAboutPage_]]">
+      <settings-about-page current-route="{{currentRoute}}">
+      </settings-about-page>
+    </template>
   </template>
   <script src="settings_main.js"></script>
 </dom-module>