MD Settings: move autofill and manage password toggles to their subpages.

chrome/browser/resources/settings/settings_shared_css.html

 <link rel="import" href="chrome://resources/cr_elements/shared_style_css.html">
 <link rel="import" href="settings_vars_css.html">
 
 <!-- Common styles for Material Design settings. -->
 <dom-module id="settings-shared">
   <template>
     <style include="cr-shared-style">
       /* Included here so we don't have to include "iron-positioning" in every
        * stylesheet. See crbug.com/498405. */
       [hidden] {
@@ skipping 68 matching lines @@
        * "delete") while the secondary is often a "Cancel" button. A tertiary
        * button may be used to get more information or similar, that we expect
        * most users will not need. */
       .primary-button {
         --paper-button: {
           font-weight: 500;
           text-align: start;
         };
       }
 
+      .primary-toggle {
+        color: var(--paper-grey-600);
+        font-weight: 500;
+      }
+
+      .primary-toggle[checked] {
+        color: var(--google-blue-500);
+      }
+
       /* See notes in .primary-button. */
       .secondary-button {
         --paper-button: {
           color: var(--paper-grey-600);
           font-weight: 500;
           min-width: 1em;  /* A tighter fit than 5.14em for short buttons. */
           text-decoration: none;
         };
         --paper-button-flat-keyboard-focus: {
           background: rgba(0, 0, 0, .12);
@@ skipping 264 matching lines @@
       /* Turns the arrow direction downwards, when the bubble is placed above
        * the anchor element */
       .search-bubble-innards.above::after {
         bottom: -5px;
         top: auto;
         transform: rotate(-135deg);
       }
     </style>
   </template>
 </dom-module>