MD Settings: Touch up cr-dialog footers

ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html

Index: ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
diff --git a/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html b/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
index 6b2b6b60a003c9186e055ffd01a84df676b74ac1..9ffd7ea2cbcd84cab1e4c9999f833b9ebe3f33b8 100644
--- a/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
+++ b/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html
@@ -2,6 +2,7 @@
 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/default-theme.html">
 
 <dom-module id="cr-dialog">
   <template>
@@ -29,8 +30,7 @@
 
       .title-container {
         align-items: center;
-        /* TODO(dbeam): should this be a --settings-separator-line? */
-        border-bottom: 1px solid rgba(0, 0, 0, 0.14);
+        border-bottom: 1px solid var(--divider-color);
         display: flex;
         min-height: 52px;
       }
@@ -84,12 +84,15 @@
       }
 
       :host ::content .footer {
-        background-color: var(--paper-grey-200);
         border-bottom-left-radius: inherit;
         border-bottom-right-radius: inherit;
         margin: 0;
         padding: 12px 20px;
       }
+
+      :host ::content .border-top-divider {
+        border-top: 1px solid var(--divider-color);
+      }
     </style>
     <div class="title-container">
       <content select=".title"></content>