MD Settings: Fix several global UI polish bugs.

chrome/browser/resources/settings/settings_vars_css.html

 <link rel="import" href="chrome://resources/cr_elements/shared_vars_css.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/color.html">
 
 <!-- Common css variables for Material Design settings. -->
 <style is="custom-style">
   /* We keep our vars in sort order, though some vars must be defined prior to
    * others. The --settings-* vars are defined explicitly prior to the --paper-*
    * and --iron-* vars.
    */
   :root {
@@ skipping 22 matching lines @@
     --settings-page-vertical-margin: 21px;
 
     /* These are used for row items such as radio buttons, check boxes, list
      * items etc. */
     --settings-row-min-height: 44px;
     --settings-row-two-line-min-height: 56px;
 
     /* These are used for the settings-box containers, which may contain one or
      * more "row items". */
     --settings-box-min-height: 48px;
-    --settings-box-two-line-min-height: 60px;
+    --settings-box-two-line-min-height: 64px;
+    --settings-box-three-line-min-height: 84px;
 
     --settings-text-elide: {
       overflow: hidden;
       text-overflow: ellipsis;
       white-space: nowrap;
     };
 
     --settings-secondary: {
       color: var(--paper-grey-600);
       font-weight: 400;
-      margin-top: 4px;
     };
     --settings-separator-line: var(--cr-separator-line);
 
     --settings-title-bar-background-color: var(--google-blue-700);
     --settings-title-bar-color: rgb(255, 255, 255);
     --settings-title-search-color: rgb(192, 199, 205);
     --settings-toggle-bar-size: {
       height: 12px;
       left: 4px;
-      width: 24px;
+      width: 28px;
     };
     --settings-toggle-button-size: {
       box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
       height: 16px;
       top: -2px;
       width: 16px;
     };
+    --settings-toggle-ink-size: {
+      height: 40px;
+      top: -12px;
+      left: -12px;
+      width: 40px;
+    };
     --settings-toggle-color: var(--google-blue-500);
 
     --checkbox-margin-start: 2px;
     --checkbox-size: 16px;
     --checkbox-spacing: 18px;
     --iron-icon-fill-color: var(--paper-grey-600);
     --iron-icon-height: var(--cr-icon-size);
     --iron-icon-width: var(--cr-icon-size);
     --paper-checkbox-label-color: inherit;
     --paper-dialog-color: inherit;
@@ skipping 14 matching lines @@
     };
     --paper-radio-button-ink-size: 40px;
     --paper-radio-button-label-color: inherit;
     --paper-radio-button-size: 16px;
     --paper-radio-group-item-padding: 0;
 
     --paper-toggle-button-checked-bar: var(--settings-toggle-bar-size);
     --paper-toggle-button-checked-bar-color: var(--settings-toggle-color);
     --paper-toggle-button-checked-button: {
       @apply(--settings-toggle-button-size);
-      transform: translate(14px, 0);
+      transform: translate(18px, 0);
     };
     --paper-toggle-button-checked-button-color: var(--settings-toggle-color);
     --paper-toggle-button-label-spacing: 0;
     --paper-toggle-button-unchecked-bar: var(--settings-toggle-bar-size);
     --paper-toggle-button-unchecked-button: var(--settings-toggle-button-size);
+    --paper-toggle-button-unchecked-ink: var(--settings-toggle-ink-size);
+
+    --settings-input-underline: {
+      border-color: var(--paper-grey-300);
+    }
+
+    --paper-input-container-underline: var(--settings-input-underline);
   }
 </style>