[MD settings] icons for clickable rows

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">
+      button[is='paper-icon-button-light'] {
+        --paper-icon-button-light-ripple: {
+          /* Center the ripple on the icon button. */
+          height: 36px;
+          left: -8px;
+          top: -8px;
+          width: 36px;
+        };
+        -webkit-margin-start: 16px;
+        background-size: cover;
+        flex-shrink: 0;
+        height: 20px;
+        width: 20px;
+      }
+
+      [actionable] button[is="paper-icon-button-light"].icon-arrow-right {
+        background-image: url(images/arrow_right.svg);
+      }
+
+      [actionable] button[is="paper-icon-button-light"].icon-external {
+        background-image: url(images/open_in_new.svg);
+      }
+
       /* Use <h2> as the "sub-header" mentioned in the UX design docs. */
       h2 {
         align-items: center;
         align-self: flex-start;
         color: var(--paper-grey-600);
         display: flex;
         font-size: inherit;
         font-weight: 500;
         margin: 0;
         padding-top: 24px;
         padding-bottom: 12px;
       }
 
       iron-icon[icon='cr:check'],
       iron-icon[icon='settings:done'] {
        --iron-icon-fill-color: var(--google-green-500);
       }
 
       paper-button {
+        height: 32px;
         margin: 0;
       }
 
       paper-button[toggles][active] {
         background-color: var(--paper-grey-300);
       }
 
       paper-toggle-button {
         @apply(--settings-actionable);
-        height: 20px;
+        height: var(--settings-row-min-height);
         width: 31px;
       }
 
       paper-dropdown-menu-light {
         --iron-icon-fill-color: var(--paper-grey-600);
         --paper-font-subhead: {
           font-size: inherit;
         };
         --paper-dropdown-menu-input: {
           border-bottom-color: var(--paper-grey-300);
@@ skipping 244 matching lines @@
         justify-content: center;
       }
 
       /* The lower line of text in a .settings-box.two-line. */
       .settings-box .secondary {
         @apply(--settings-secondary);
       }
 
       /* The middle part (horizontally) of a row. */
       .settings-box .middle {
-        -webkit-margin-start: 16px;
+        -webkit-padding-start: 16px;
         align-items: center;
         flex: auto;
       }
 
+      .settings-box .middle.two-line {
+        display: flex;
+        min-height: var(--settings-row-two-line-min-height);
+      }
+
       /* The start (left in LTR) part (horizontally) of a row. */
       .settings-box .start {
         align-items: center;
         flex: auto;
       }
 
+      .settings-box .start.two-line {
+        display: flex;
+        min-height: var(--settings-row-two-line-min-height);
+      }
+
       /* The secondary-action wraps a clickable sub-area of a .settings-box.
        * An example is the |sign out| button on the People settings.
        * Here is an example with and without a secondary action box:
        *
        *  +-------------------------------------------------------+
        *  | Main action area .settings-box    | .secondary-action |
        *  +-------------------------------------------------------+
        *  | Another setting-box without a secondary-action        |
        *  +-------------------------------------------------------+ */
       .settings-box .secondary-action {
         -webkit-border-start: var(--settings-separator-line);
+        -webkit-margin-start: 20px;
         -webkit-padding-start: 20px;
+        align-items: center;
+        display: flex;
         flex-shrink: 0;
+        height: var(--settings-row-min-height);
       }
 
       .settings-box paper-item iron-icon {
         /* Same padding as paper-icon-button. */
         padding: 8px;
       }
 
       /* Helper for a list frame to automatically avoid the separator line. */
       .vertical-list > *:not(:first-of-type) {
         border-top: var(--settings-separator-line);
@@ skipping 49 matching lines @@
       /* Turns the arrow direction downwards, when the bubble is placed above
        * the anchor element */
       .search-bubble-innards.above::after {
         -webkit-transform: rotate(-135deg);
         bottom: -5px;
         top: auto;
       }
     </style>
   </template>
 </dom-module>