MD Settings: long dialog body should have overscroll line.

chrome/browser/resources/settings/passwords_and_forms_page/address_edit_dialog.html

Index: chrome/browser/resources/settings/passwords_and_forms_page/address_edit_dialog.html
diff --git a/chrome/browser/resources/settings/passwords_and_forms_page/address_edit_dialog.html b/chrome/browser/resources/settings/passwords_and_forms_page/address_edit_dialog.html
index 3a175f4b7e281fbb2d74b190a29cf2c3bedf018e..92449eb49cf30d2026ffa22c51fa0b60bcc1e167 100644
--- a/chrome/browser/resources/settings/passwords_and_forms_page/address_edit_dialog.html
+++ b/chrome/browser/resources/settings/passwords_and_forms_page/address_edit_dialog.html
@@ -1,4 +1,5 @@
 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
+<link rel="import" href="chrome://resources/cr_elements/cr_scrollable_behavior.html">
 <link rel="import" href="chrome://resources/html/cr.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/md_select_css.html">
@@ -53,10 +54,14 @@
           max-height: 270px;
         }
       }
+
+      [scrollable].is-scrolled {
+        border-top-color: transparent;

[scottchen, 2017/02/17 22:40:04]

This is to prevent double-border, since the dialog title already has a top
border all the time.

+      }
     </style>
     <dialog is="cr-dialog" id="dialog">
       <div class="title">[[title_]]</div>
-      <div class="body">
+      <div class="body" scrollable>
         <template is="dom-repeat" items="[[addressWrapper_]]">
           <div class="address-row">
             <template is="dom-repeat" items="[[item]]">