Revert of HttpCache::Transaction layer allowing parallel validation

net/url_request/url_request_unittest.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 <memory>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "build/build_config.h"
@@ skipping 4120 matching lines @@
   context.Init();
 
   d.set_credentials(AuthCredentials(kUser, kSecret));
 
   {
     GURL url(http_test_server()->GetURL("/auth-basic"));
     std::unique_ptr<URLRequest> r(
         context.CreateRequest(url, DEFAULT_PRIORITY, &d));
     r->Start();
 
-    base::RunLoop().Run();
-
     {
       HttpRequestHeaders headers;
       EXPECT_TRUE(r->GetFullRequestHeaders(&headers));
-      EXPECT_TRUE(headers.HasHeader("Authorization"));
+      EXPECT_FALSE(headers.HasHeader("Authorization"));
     }
 
+    base::RunLoop().Run();
+
     EXPECT_EQ(OK, d.request_status());
     EXPECT_EQ(200, r->GetResponseCode());
     EXPECT_TRUE(d.auth_required_called());
     EXPECT_EQ(1, network_delegate.created_requests());
     EXPECT_EQ(0, network_delegate.destroyed_requests());
   }
   EXPECT_EQ(1, network_delegate.destroyed_requests());
 }
 
 // Tests that the network delegate can synchronously complete OnAuthRequired
@@ skipping 6769 matching lines @@
   AddTestInterceptor()->set_main_intercept_job(std::move(job));
 
   req->Start();
   req->Cancel();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(ERR_ABORTED, d.request_status());
   EXPECT_EQ(0, d.received_redirect_count());
 }
 
 }  // namespace net