[MD settings] adjust button layout

chrome/browser/resources/settings/on_startup_page/startup_urls_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/action_link_css.html">
 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/cr/ui/focus_without_ink.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/iron-list/iron-list.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_scrollable_behavior.html">
 <link rel="import" href="../controls/extension_controlled_indicator.html">
 <link rel="import" href="../settings_shared_css.html">
 <link rel="import" href="startup_url_dialog.html">
 <link rel="import" href="startup_url_entry.html">
 <link rel="import" href="startup_urls_page_browser_proxy.html">
 
 <dom-module id="settings-startup-urls-page">
   <template>
     <style include="settings-shared action-link iron-flex">
       #outer {
         @apply(--settings-list-frame-padding);
         max-height: 395px;  /** Enough height to show six entries. */
       }
 
+      #container {
+        overflow: visible;  /* Allow ripple to go outside of the row. */
+      }

[stevenjb, 2017/05/25 22:28:17]

We might want to do this separately, it's not completely obviously related.
Also, what happens if there are only a couple of startup urls?

+
       #container iron-list > settings-startup-url-entry:not(:first-of-type) {
         border-top: var(--settings-separator-line);
       }
 
       #container settings-startup-url-entry {
         cursor: default;
       }
     </style>
     <div id="outer" class="layout vertical flex vertical-list">
       <div id="container" class="scroll-container" scrollable>
@@ skipping 32 matching lines @@
       </template>
     </div>
     <template is="dom-if" if="[[showStartupUrlDialog_]]" restamp>
       <settings-startup-url-dialog model="[[startupUrlDialogModel_]]"
           on-close="destroyUrlDialog_">
       </settings-startup-url-dialog>
     </template>
   </template>
   <script src="startup_urls_page.js"></script>
 </dom-module>