Fix some mixed content warnings when accessing extension docs

chrome/common/extensions/docs/external_extensions.html

Index: chrome/common/extensions/docs/external_extensions.html
diff --git a/chrome/common/extensions/docs/external_extensions.html b/chrome/common/extensions/docs/external_extensions.html
index d4b7ca72d955ff41a8b5a3a1bb3b40ef7c0638a7..bd84abb97b391b393903d1d7162d913295214849 100644
--- a/chrome/common/extensions/docs/external_extensions.html
+++ b/chrome/common/extensions/docs/external_extensions.html
@@ -170,10 +170,10 @@
             </div>
           </form>
 
-          <script type="text/javascript" src="http://www.google.com/jsapi"></script>
+          <script type="text/javascript" src="https://www.google.com/jsapi"></script>
           <script type="text/javascript">google.load("elements", "1", {packages: "transliteration"});</script>
-          <script type="text/javascript" src="http://www.google.com/coop/cse/t13n?form=cse&amp;t13n_langs=en"></script>
-          <script type="text/javascript" src="http://www.google.com/coop/cse/brand?form=cse&amp;lang=en"></script>
+          <script type="text/javascript" src="https://www.google.com/coop/cse/t13n?form=cse&amp;t13n_langs=en"></script>
+          <script type="text/javascript" src="https://www.google.com/coop/cse/brand?form=cse&amp;lang=en"></script>
         </td>
       </tr>
     </tbody></table>
@@ -854,8 +854,8 @@ through the UI, and then uninstalling it. </p>
   </p>
 
 <!-- begin analytics -->
-<script src="http://www.google-analytics.com/urchin.js" type="text/javascript"></script>
-<script src="http://www.google-analytics.com/ga.js" type="text/javascript"></script>
+<script src="https://www.google-analytics.com/urchin.js" type="text/javascript"></script>
+<script src="https://www.google-analytics.com/ga.js" type="text/javascript"></script>
 
 <script type="text/javascript">
   // chrome doc tracking