Revert "Apply test isolation goodness to net_unittests."

net/ocsp/nss_ocsp.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/ocsp/nss_ocsp.h"
 
 // Work around https://bugzilla.mozilla.org/show_bug.cgi?id=455424
 // until NSS 3.12.2 comes out and we update to it.
 #define Lock FOO_NSS_Lock
 #include <certt.h>
@@ skipping 43 matching lines @@
     request_context_ = request_context;
   }
   static URLRequestContext* url_request_context() {
     return request_context_;
   }
 
  private:
   friend struct DefaultSingletonTraits<OCSPInitSingleton>;
   OCSPInitSingleton();
   virtual ~OCSPInitSingleton() {
-    if (io_loop_)
-      io_loop_->RemoveDestructionObserver(this);
     request_context_ = NULL;
   }
 
   SEC_HttpClientFcn client_fcn_;
 
   // I/O thread.
   MessageLoop* io_loop_;  // I/O thread
 
   // URLRequestContext for OCSP handlers.
   static URLRequestContext* request_context_;
@@ skipping 487 matching lines @@
 // This function would be called before NSS initialization.
 void SetURLRequestContextForOCSP(URLRequestContext* request_context) {
   OCSPInitSingleton::set_url_request_context(request_context);
 }
 
 URLRequestContext* GetURLRequestContextForOCSP() {
   return OCSPInitSingleton::url_request_context();
 }
 
 }  // namespace net