Remove support for a URLRequest having a NULL Delegate.

net/url_request/url_request_context.cc

 // Copyright (c) 2012 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/url_request/url_request_context.h"
 
 #include "base/compiler_specific.h"
 #include "base/debug/alias.h"
 #include "base/debug/stack_trace.h"
 #include "base/strings/string_util.h"
@@ skipping 76 matching lines @@
 }
 
 void URLRequestContext::AssertNoURLRequests() const {
   int num_requests = url_requests_->size();
   if (num_requests != 0) {
     // We're leaking URLRequests :( Dump the URL of the first one and record how
     // many we leaked so we have an idea of how bad it is.
     char url_buf[128];
     const URLRequest* request = *url_requests_->begin();
     base::strlcpy(url_buf, request->url().spec().c_str(), arraysize(url_buf));
-    bool has_delegate = request->has_delegate();
     int load_flags = request->load_flags();
     base::debug::StackTrace stack_trace(NULL, 0);
     if (request->stack_trace())
       stack_trace = *request->stack_trace();
     base::debug::Alias(url_buf);
     base::debug::Alias(&num_requests);
-    base::debug::Alias(&has_delegate);
     base::debug::Alias(&load_flags);
     base::debug::Alias(&stack_trace);
     CHECK(false) << "Leaked " << num_requests << " URLRequest(s). First URL: "
                  << request->url().spec().c_str() << ".";
   }
 }
 
 }  // namespace net