Remove references to 'linux2' from our grd files.

chrome/browser/resources/options/personal_options.html

 <div id="personal-page" class="page" hidden>
   <h1 i18n-content="personalPage"></h1>
   <div class="displaytable">
 <if expr="pp_ifdef('chromeos')">
     <section>
       <h3 i18n-content="account"></h3>
       <div>
         <img id='account-picture'
             src='chrome://theme/IDR_LOGIN_DEFAULT_USER'>
         <label>
@@ skipping 73 matching lines @@
       </div>
     </section>
 <if expr="not pp_ifdef('chromeos')">
     <section>
       <h3 i18n-content="browsingData"></h3>
       <div>
         <button id="import-data" i18n-content="importData"></button>
       </div>
     </section>
 </if>
-<if expr="not pp_ifdef('toolkit_views') and (os == 'linux2' or os.find('bsd') != -1 or os == 'sunos5')">
+<if expr="not pp_ifdef('toolkit_views') and is_posix and not is_macosx">
     <section>
       <h3 i18n-content="appearance"></h3>
       <div>
         <div>
           <button id="themes-GTK-button"
               i18n-content="themesGTKButton"></button>
           <button id="themes-reset"
               i18n-content="themesSetClassic"></button>
         </div>
         <div id="themes-gallery-div">
@@ skipping 28 matching lines @@
         </div>
         <div id="themes-gallery-div">
           <a id="themes-gallery" i18n-content="themesGallery"
               i18n-values="href:themesGalleryURL" target="_blank"></a>
         </div>
       </div>
     </section>
 </if>
   </div>
 </div>