MD Settings: Device settings polish

chrome/browser/resources/settings/device_page/pointers.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-button/paper-radio-button.html">
 <link rel="import" href="../controls/settings_radio_group.html">
 <link rel="import" href="../controls/settings_slider.html">
 <link rel="import" href="../controls/settings_toggle_button.html">
 <link rel="import" href="device_page_browser_proxy.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-pointers">
   <template>
@@ skipping 35 matching lines @@
               label-min="$i18n{pointerSlow}"
               label-max="$i18n{pointerFast}">
           </settings-slider>
         </div>
       </div>
     </div>
     <div id="touchpad" hidden$="[[!hasTouchpad]]">
       <!-- Subsection title only appears if both mouse and touchpad exist. -->
       <h2 hidden$="[[!hasMouse]]">$i18n{touchpadTitle}</h2>
       <div class$="[[getSubsectionClass_(hasMouse, hasTouchpad)]]">
-        <div class="settings-box block first">
-          <settings-toggle-button id="enableTapToClick"
+        <div class="settings-box first">
+          <settings-toggle-button id="enableTapToClick" class="start"
               pref="{{prefs.settings.touchpad.enable_tap_to_click}}"
               label="$i18n{touchpadTapToClickEnabledLabel}">
           </settings-toggle-button>
-          <settings-toggle-button id="enableTapDragging"
+        </div>
+        <div class="settings-box">
+          <settings-toggle-button id="enableTapDragging" class="start"
               pref="{{prefs.settings.touchpad.enable_tap_dragging}}"
               label="$i18n{tapDraggingLabel}">
           </settings-toggle-button>
         </div>
         <div class="settings-box">
           <div class="start" id="touchpadSpeedLabel">$i18n{touchpadSpeed}</div>
             <settings-slider id="touchpadSensitivity"
                 pref="{{prefs.settings.touchpad.sensitivity2}}"
                 tick-values="[[sensitivityValues_]]"
                 aria-labelledby="touchpadSpeedLabel"
@@ skipping 16 matching lines @@
                 $i18n{naturalScrollLearnMore}
               </a>
             </paper-radio-button>
           </settings-radio-group>
         </div>
       </div>
     </div>
   </template>
   <script src="pointers.js"></script>
 </dom-module>