Remove the note about content script files not being able to

chrome/common/extensions/docs/static/i18n.html

 <div id="pageData-name" class="pageData">Internationalization (i18n)</div>
 
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 [NOTEs for editors:
  * Try to be consistent about string vs. message (it's probably not yet).
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 <p id="classSummary">
 An <em>internationalized</em> extension
@@ skipping 167 matching lines @@
 gadgets BIDI (bi-directional) API</a>.
 </p>
 
 <p>
 The special message <code>@@extension_id</code>
 can be used in the CSS and JavaScript files of any extension,
 whether or not the extension is localized.
 This message doesn't work in manifest files.
 </p>
 
-<p class="note">
-<b>Note:</b>
-Content script CSS files can't use
-predefined messages such as <code>@@extension_id</code>.
-For details, see
-<a href="http://crbug.com/39899">bug 39899</a>.
-</p>
-
 <p>
 The following table describes each predefined message.
 </p>
 
 <table>
 <tr>
   <th>Message name</th> <th>Description</th>
 </tr>
 <tr>
   <td> <code>@@extension_id</code> </td>
@@ skipping 369 matching lines @@
   })
 }
 </pre>
 
 <p>
 For details on calling <code>getAcceptLanguages()</code>, see the
 <a href="#method-getAcceptLanguages">API reference</a>.
 </p>
 
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