Fix some WeakPtrFactory members that aren't last

base/run_loop.h

Index: base/run_loop.h
diff --git a/base/run_loop.h b/base/run_loop.h
index f5ee5c346653f3b31cff958fbfc6a45fdad1bc96..0dce6346e76189b804f6ce7f750497a9e2d9b59b 100644
--- a/base/run_loop.h
+++ b/base/run_loop.h
@@ -94,9 +94,6 @@ class BASE_EXPORT RunLoop {
 
   MessageLoop* loop_;
 
-  // WeakPtrFactory for QuitClosure safety.
-  base::WeakPtrFactory<RunLoop> weak_factory_;
-
   // Parent RunLoop or NULL if this is the top-most RunLoop.
   RunLoop* previous_run_loop_;
 
@@ -116,6 +113,9 @@ class BASE_EXPORT RunLoop {
   // that we should quit Run once it becomes idle.
   bool quit_when_idle_received_;
 
+  // WeakPtrFactory for QuitClosure safety.
+  base::WeakPtrFactory<RunLoop> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(RunLoop);
 };