[MD settings] theme name shown in sub-label, wallpaper chrome os only

chrome/browser/resources/settings/appearance_page/appearance_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/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/device-icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/image-icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-button/paper-radio-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-toggle-button/paper-toggle-button.html">
 <link rel="import" href="chrome://md-settings/controls/settings_dropdown_menu.html">
 <link rel="import" href="chrome://md-settings/controls/settings_input.html">
 <link rel="import" href="chrome://md-settings/controls/settings_radio_group.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_animated_pages.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_subheader.html">
 <link rel="import" href="chrome://md-settings/settings_shared_css.html">
 <link rel="import" href="appearance_fonts_page.html">
 
 <dom-module id="settings-appearance-page">
   <link rel="import" type="css"
       href="chrome://md-settings/appearance_page/appearance_shared.css">
   <link rel="import" type="css" href="chrome://resources/css/widgets.css">
   <link rel="import" href="chrome://resources/html/action_link.html">
   <template>
     <style include="settings-shared"></style>
     <settings-animated-pages id="pages" current-route="{{currentRoute}}"
         section="appearance">
       <neon-animatable id="main">
+<if expr="chromeos">
         <div class="settings-box first two-line">
           <iron-icon icon="device:wallpaper"></iron-icon>
           <paper-button class="primary-button middle">
             <div>[[i18n('setWallpaper')]]</div>

[michaelpg, 2016/03/31 20:48:14]

this and below: make these OS_CHROMEOS only in
md_settings_localized_strings_provider.cc

[dschuyler, 2016/03/31 21:08:22]

Done.

             <div class="secondary">[[i18n('openWallpaperApp')]]</div>
           </paper-button>
         </div>
+</if>
         <div class="settings-box two-line">
           <iron-icon icon="image:palette"></iron-icon>
           <paper-button class="primary-button middle" id="get-themes"
               on-tap="openThemesGallery_">
             <div>[[i18n('getThemes')]]</div>
-            <div class="secondary">[[i18n('chooseFromWebStore')]]</div>
+            <div class="secondary">[[themeSublabel_]]</div>
           </paper-button>
           <template is="dom-if" if="[[allowResetTheme_]]">
-            <paper-button on-tap="resetTheme_"
+            <paper-button on-tap="resetTheme_" class="secondary-action"
                 >[[i18n('resetToDefaultTheme')]]</paper-button>
           </template>
         </div>
         <div class="settings-box two-line">
           <settings-checkbox class="start" i18n-values="label:showHomeButton"
               sub-label="[[getShowHomeSubLabel_(prefs.homepage_is_newtabpage.value, prefs.homepage.value)]]"
               pref="{{prefs.browser.show_home_button}}">
           </settings-checkbox>
         </div>
         <template is="dom-if" if="[[prefs.browser.show_home_button.value]]">
@@ skipping 42 matching lines @@
         <template is="dom-if" if="[[showFontsPage_(currentRoute.subpage.*)]]"
             restamp>
           <settings-appearance-fonts-page prefs="{{prefs}}">
           </settings-appearance-fonts-page>
         </template>
       </neon-animatable>
     </settings-animated-pages>
   </template>
   <script src="appearance_page.js"></script>
 </dom-module>