Revert of Make base::WeakPtr::Get() fast

base/message_loop/message_loop_test.cc

Index: base/message_loop/message_loop_test.cc
diff --git a/base/message_loop/message_loop_test.cc b/base/message_loop/message_loop_test.cc
index b76459665c57c38f2ca95854bcc9f4d1724c4739..de6070023b1ef84754e5e8e6bb66bb531cafff2f 100644
--- a/base/message_loop/message_loop_test.cc
+++ b/base/message_loop/message_loop_test.cc
@@ -368,7 +368,7 @@ void RunTest_Nesting(MessagePumpFactory factory) {
   std::unique_ptr<MessagePump> pump(factory());
   MessageLoop loop(std::move(pump));
 
-  int depth = 50;
+  int depth = 100;
   ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
                                           BindOnce(&NestingFunc, &depth));
   RunLoop().Run();