Update references to the extension gallery.

chrome/common/extensions/docs/static/autoupdate.html

 <div id="pageData-name" class="pageData">Autoupdating</div>
 <div id="pageData-showTOC" class="pageData">true</div>
 
 <p>We want extensions to be autoupdated for some of the same reasons as Google Chrome itself: to incorporate bug and security fixes, add new features or performance enhancements, and improve user interfaces.</p>
 
-<p>If you publish your extension using the <a href="https://chrome.google.com/webstore/developer/dashboard">Chrome Developer Dashboard</a>, you can <em>ignore this page</em>. You can use the dashboard to release updated versions of your extension to users, as well as to the Extensions Gallery or Chrome Web Store.</p>
+<p>If you publish your extension using the <a href="https://chrome.google.com/webstore/developer/dashboard">Chrome Developer Dashboard</a>, you can <em>ignore this page</em>. You can use the dashboard to release updated versions of your extension to users, as well as to the Chrome Web Store.</p>
 
-<p>If you want to host your extension somewhere other than the gallery or store, keep reading.
+<p>If you want to host your extension somewhere other than the store, keep reading.
 You should also read <a href="hosting.html">Hosting</a> and
 <a href="packaging.html">Packaging</a>.</p>
 
 
 <h2>Overview</h2>
 <ul><li>An extension manifest may contain an "update_url" field, pointing to a location for doing update checks.</li>
 <li>The content returned by an update check is an <em>update manifest</em> XML document listing the latest version of an extension.</li></ul>
 
 <p>Every few hours, the browser checks whether any installed extensions have an update URL. For each one, it makes a request to that URL looking for an update manifest XML file. If the update manifest mentions a version of an extension that is more recent than what's installed, the browser downloads and installs the new version. As with manual updates, the new <code>.crx</code> file must be signed with the same private key as the currently installed version.</p>
 
@@ skipping 109 matching lines @@
 <pre>&lt;?xml version='1.0' encoding='UTF-8'?&gt;
 &lt;gupdate xmlns='http://www.google.com/update2/response' protocol='2.0'&gt;
 &nbsp;&nbsp;&lt;app appid='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'&gt;
 &nbsp;&nbsp; &nbsp;&lt;updatecheck&nbsp;codebase='http://myhost.com/mytestextension/mte_v2.crx'&nbsp;version='2.0' <b>prodversionmin='3.0.193.0'</b>/&gt;
 &nbsp;&nbsp;&lt;/app&gt;
 &lt;/gupdate&gt;
 </pre>
 
 <p>This would ensure that users of this extension would autoupdate to version 2 only if they are running Google Chrome 3.0.193.0 or greater.</p>