Shift URLRequestContextStorage over to taking scoped_ptrs.

ios/crnet/crnet_environment.mm

 // Copyright 2014 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 "ios/crnet/crnet_environment.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
@@ skipping 376 matching lines @@
   }];
   main_context_->set_http_user_agent_settings(
       new net::StaticHttpUserAgentSettings(acceptable_languages, user_agent));
 
   main_context_->set_ssl_config_service(new net::SSLConfigServiceDefaults);
   main_context_->set_transport_security_state(
       new net::TransportSecurityState());
   http_server_properties_.reset(new net::HttpServerPropertiesImpl());
   main_context_->set_http_server_properties(
       http_server_properties_->GetWeakPtr());
+  // TODO(rdsmith): Note that the ".release()" calls below are leaking
+  // the objects in question; this should be fixed by having an object
+  // corresponding to URLRequestContextStorage that actually owns those
+  // objects.  See http://crbug.com/523858.
   main_context_->set_host_resolver(
       net::HostResolver::CreateDefaultResolver(nullptr).release());
-  main_context_->set_cert_verifier(net::CertVerifier::CreateDefault());
+  main_context_->set_cert_verifier(
+      net::CertVerifier::CreateDefault().release());
   main_context_->set_http_auth_handler_factory(
       net::HttpAuthHandlerRegistryFactory::CreateDefault(
-          main_context_->host_resolver()));
+          main_context_->host_resolver())
+          .release());
   main_context_->set_proxy_service(
       net::ProxyService::CreateUsingSystemProxyResolver(
-          proxy_config_service_.get(), 0, nullptr));
+          proxy_config_service_.get(), 0, nullptr)
+          .release());
 
   // Cache
   NSArray* dirs = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,
                                                       NSUserDomainMask,
                                                       YES);
   base::FilePath cache_path =
       base::mac::NSStringToFilePath([dirs objectAtIndex:0]);
   cache_path = cache_path.Append(FILE_PATH_LITERAL("crnet"));
   net::HttpCache::DefaultBackend* main_backend =
       new net::HttpCache::DefaultBackend(net::DISK_CACHE,
@@ skipping 80 matching lines @@
       if (backend)
         backend->DoomAllEntries(client_callback);
   });
   int rc = cache->GetBackend(&backend, doom_callback);
   if (rc != net::ERR_IO_PENDING) {
     // GetBackend doesn't call the callback if it completes synchronously, so
     // call it directly here.
     doom_callback.Run(rc);
   }
 }