Bug 781323: fix about:sync-log, r=gps

--HG--
extra : rebase_source : 168339ad89dd0263b83deb7d9b028d59562cffe0

services/sync/Weave.js

@@ -59,10 +59,12 @@ AboutWeaveLog.prototype = {
     let channel = Services.io.newChannelFromURI(uri);
     channel.originalURI = aURI;
 
-    // Setting the owner to null means that we'll go through the normal
-    // path in GetChannelPrincipal and create a codebase principal based
-    // on the channel's originalURI
-    channel.owner = null;
+    // Ensure that the about page has the same privileges as a regular directory
+    // view. That way links to files can be opened.
+    let ssm = Cc["@mozilla.org/scriptsecuritymanager;1"]
+                .getService(Ci.nsIScriptSecurityManager);
+    let principal = ssm.getSimpleCodebasePrincipal(uri);
+    channel.owner = principal;
     return channel;
   }
 };