Fix tree bustage

base/message_loop.cc

Index: base/message_loop.cc
===================================================================
--- base/message_loop.cc	(revision 11473)
+++ base/message_loop.cc	(working copy)
@@ -373,11 +373,13 @@
   }
   did_work |= !deferred_non_nestable_work_queue_.empty();
   while (!deferred_non_nestable_work_queue_.empty()) {
-    Task* task = deferred_non_nestable_work_queue_.front().task;
-    deferred_non_nestable_work_queue_.pop();
     // TODO(darin): Delete all tasks once it is safe to do so.
     // Until it is totaly safe, just delete them to keep purify happy.
 #ifdef PURIFY
+    Task* task = deferred_non_nestable_work_queue_.front().task;
+#endif
+    deferred_non_nestable_work_queue_.pop();
+#ifdef PURIFY
     delete task;
 #endif
   }