Make the auto-launch experiment profile-aware.

chrome/browser/resources/options2/browser_options.html

 <div id="browserPage" class="page" hidden>
   <header>
     <h1 i18n-content="browserPage"></h1>
     <span id="browser-options-search-field-container"
         class="search-field-container">
       <input id="search-field" type="search"
           i18n-values="placeholder:searchPlaceholder;
                        aria-label:searchPlaceholder" incremental>
     </span>
   </header>
@@ skipping 232 matching lines @@
 </if>
   </section>
 <if expr="not pp_ifdef('chromeos')">
   <section>
     <h3 i18n-content="sectionTitleDefaultBrowser"></h3>
     <div>
       <button id="defaultBrowserUseAsDefaultButton"
           i18n-content="defaultBrowserUseAsDefault" hidden></button>
       <div id="defaultBrowserState"
           i18n-content="defaultBrowserUnknown"></div>
+      <div id="autoLaunchOption" class="checkbox" hidden>
+        <label id="autoLaunchLabel">
+          <input id="autoLaunch" type="checkbox">
+          <span i18n-content="autoLaunchText"></span>
+        </label>
+      </div>
     </div>
   </section>
 </if>
 <if expr="pp_ifdef('chromeos')">
   <!-- This section is temporarily duplicated here for ChromeOS. -->
   <!-- TODO(csilv): Move to 'Under the Hood' for ChromeOS only. -->
   <!-- http://crbug.com/110527 -->
   <section id="startupSection">
     <h3 i18n-content="sectionTitleStartup"></h3>
     <div>
@@ skipping 30 matching lines @@
   </section>
 </if>
   <section>
     <h3 i18n-content="sectionTitleAdvanced"></h3>
     <div>
       <button id="advancedOptionsButton"
           i18n-content="advancedOptionsButtonTitle"></button>
     </div>
   </section>
 </div>