Remove .html extension from links

chrome/common/extensions/docs/templates/intros/browsingData.html

 <h2 id="manifest">Manifest</h2>
 
 <p>
   You must declare the "browsingData" permission in the
-  <a href="manifest.html">extension manifest</a> to use this API.
+  <a href="manifest">extension manifest</a> to use this API.
 </p>
 
 <pre data-filename="manifest.json">
 {
   "name": "My extension",
   ...
   <b>"permissions": [
     "browsingData",
   ]</b>,
   ...
@@ skipping 128 matching lines @@
 <p class="caution">
   <strong>Seriously</strong>: Be careful with <code>protectedWeb</code> and
   <code>extension</code>. These are destructive operations that your users
   will write angry email about if they're not well-informed about what to
   expect when your extension removes data on their behalf.
 </p>
 
 <h2 id="samples">Examples</h2>
 <p>
   Samples for the <code>browsingData</code> API are available
-  <a href="samples.html#browsingData">on the samples page</a>.
+  <a href="samples#browsingData">on the samples page</a>.
 </p>