MD Settings: Fix layout for Play Store 'Learn more' link

chrome/browser/resources/settings/android_apps_page/android_apps_page.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="android_apps_browser_proxy.html">
 <link rel="import" href="../controls/settings_toggle_button.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../prefs/prefs_behavior.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-android-apps-page">
   <template>
     <style include="settings-shared">
       a {
         -webkit-margin-start: 4px;
-        height: var(--checkbox-size);
       }
 
       .indented {
         -webkit-margin-start: var(--settings-indent-width);
       }
     </style>
 
     <div class="settings-box first">
       <settings-toggle-button id="enabled" class="start"
           pref="{{prefs.arc.enabled}}"
@@ skipping 30 matching lines @@
         </paper-button>
         <paper-button class="action-button"
             on-tap="onConfirmDisableDialogConfirm_">
           $i18n{confirm}
         </paper-button>
       </div>
     </dialog>
   </template>
   <script src="android_apps_page.js"></script>
 </dom-module>