Support chrome-extension:// scheme in URLPattern.

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

 <div id="pageData-name" class="pageData">Formats: Manifest Files</div>
 <div id="pageData-showTOC" class="pageData">true</div>
 
 <p>
 Every extension, installable web app, and theme has a
 <a href="http://www.json.org">JSON</a>-formatted manifest file,
 named <code>manifest.json</code>,
 that provides important information.
 </p>
 
@@ skipping 413 matching lines @@
 <tr>
   <td> <em>match pattern</em> </td>
   <td> Specifies a <em>host permission</em>.
        Required if the extension wants to interact
        with the code running on pages.
        Many extension capabilities, such as
        <a href="xhr.html">cross-origin XMLHttpRequests</a>,
        <a href="content_scripts.html#pi">programmatically injected
        content scripts</a>, and <a href="cookies.html">the cookies API</a>
        require host permissions. For details on the syntax, see
-       <a href="match_patterns.html">Match Patterns</a>.
+       <a href="match_patterns.html">Match Patterns</a>. You cannot use
+       the chrome-extension:// scheme in match patterns for host permissions.

[Aaron Boodman, 2011/12/09 16:28:25]

This line isn't necessary.

[battre, 2011/12/09 17:07:51]

Done.

   </td>
 </tr>
 <tr id="bg">
   <td> "background" </td>
   <td> <p>
        Makes Chrome start up early and and shut down late,
        so that apps and extensions can have a longer life.
        </p>
 
        <p>
@@ skipping 204 matching lines @@
 A missing integer is equal to zero.
 For example, 1.1.9.9999 is newer than 1.1.
 </p>
 
 <p>
 For more information, see
 <a href="autoupdate.html">Autoupdating</a>.
 </p>
 
 <!-- [PENDING: Possibly: point to the store/dashboard and make a big deal of the fact that autoupdating is free if you use them.] -->