Revert of Remove reference counting from HttpNetworkSession.

net/url_request/view_cache_helper_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 "net/url_request/view_cache_helper.h"
 
 #include "base/pickle.h"
 #include "net/base/net_errors.h"
 #include "net/base/test_completion_callback.h"
 #include "net/disk_cache/disk_cache.h"
@@ skipping 13 matching lines @@
   ~TestURLRequestContext() override { AssertNoURLRequests(); }
 
   // Gets a pointer to the cache backend.
   disk_cache::Backend* GetBackend();
 
  private:
   HttpCache cache_;
 };
 
 TestURLRequestContext::TestURLRequestContext()
-    : cache_(new MockNetworkLayer(),
-             nullptr,
-             HttpCache::DefaultBackend::InMemory(0),
-             true) {
+    : cache_(new MockNetworkLayer(), NULL,
+             HttpCache::DefaultBackend::InMemory(0)) {
   set_http_transaction_factory(&cache_);
 }
 
 void WriteHeaders(disk_cache::Entry* entry, int flags,
                   const std::string& data) {
   if (data.empty())
     return;
 
   base::Pickle pickle;
   pickle.WriteInt(flags | 1);  // Version 1.
@@ skipping 158 matching lines @@
 
   std::string data;
   TestCompletionCallback cb1;
   rv = helper.GetEntryInfoHTML(key, &context, &data, cb1.callback());
   EXPECT_EQ(OK, cb1.GetResult(rv));
 
   EXPECT_NE(std::string::npos, data.find("RESPONSE_INFO_TRUNCATED"));
 }
 
 }  // namespace net