Define os_posix in gyp files to get new Unix platforms added quickly

chrome/browser/resources/options/personal_options.html

 <div id="personal-page" class="page hidden">
   <h1 i18n-content="personalPage"></h1>
 <if expr="pp_ifdef('chromeos')">
   <section>
     <h3 i18n-content="account"></h3>
     <div>
       <table class="option-control-table">
         <tr>
           <td>
             <img id='account-picture'
@@ skipping 85 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)">
+<if expr="not pp_ifdef('toolkit_views') and (os == 'linux2' or os.find('bsd') != -1 or os == 'sunos5')">
   <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>