Bug 1227444 - Remove a closed window from _windows right away without waiting for a flush to complete. r=billm

--HG--
extra : commitid : 5yAy0HdlN7x
extra : rebase_source : cdcdf99e6d7360f00e8649994179c428378576e7
extra : amend_source : f33259c41791f4b5cce1e9eac4f59eb2356fa91f

browser/components/sessionstore/SessionStore.jsm

@@ -1246,6 +1246,9 @@ var SessionStoreInternal = {
       // we don't want to save the busy state
       delete winData.busy;
 
+      // clear this window from the list, since it has definitely been closed.
+      delete this._windows[aWindow.__SSi];
+
       // Now we have to figure out if this window is worth saving in the _closedWindows
       // Object.
       //
@@ -1291,8 +1294,6 @@ var SessionStoreInternal = {
           this.maybeSaveClosedWindow(winData);
         }
 
-        // clear this window from the list
-        delete this._windows[aWindow.__SSi];
         // Update the tabs data now that we've got the most
         // recent information.
         this.cleanUpWindow(aWindow, winData);