Do not set io_loop_ to NULL until we have deleted request_ and set...

net/ocsp/nss_ocsp.cc

Index: net/ocsp/nss_ocsp.cc
===================================================================
--- net/ocsp/nss_ocsp.cc	(revision 33697)
+++ net/ocsp/nss_ocsp.cc	(working copy)
@@ -216,16 +216,15 @@
     } while (request_->Read(buffer_, kRecvBufferSize, &bytes_read));
 
     if (!request_->status().is_io_pending()) {
-      MessageLoop* io_loop = io_loop_;
+      delete request_;
+      request_ = NULL;
+      io_loop_->RemoveDestructionObserver(this);
       {
         AutoLock autolock(lock_);
         finished_ = true;
         io_loop_ = NULL;
       }
       cv_.Signal();
-      delete request_;
-      request_ = NULL;
-      io_loop->RemoveDestructionObserver(this);
     }
   }