Update a comment in proxy_resolution_service_provider_unittest.cc following deprecation of base::No…

chromeos/dbus/services/proxy_resolution_service_provider_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 "chromeos/dbus/services/proxy_resolution_service_provider.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 160 matching lines @@
 
   // Helper method for the destructor that resets |proxy_service_|.
   void DeleteProxyServiceOnNetworkThread() {
     CHECK(context_getter_->GetNetworkTaskRunner()->BelongsToCurrentThread());
     proxy_service_.reset();
   }
 
   net::ProxyResolver* proxy_resolver_;  // Not owned.
 
   // Created, used, and destroyed on the network thread (since net::ProxyService
-  // derives from base::NonThreadSafe).
+  // is thread-affine (uses ThreadChecker)).
   std::unique_ptr<net::ProxyService> proxy_service_;
 
   scoped_refptr<net::TestURLRequestContextGetter> context_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(TestDelegate);
 };
 
 }  // namespace
 
 class ProxyResolutionServiceProviderTest : public testing::Test {
@@ skipping 217 matching lines @@
   EXPECT_TRUE(reader.PopString(&error));
   EXPECT_EQ("DIRECT", proxy_info);
   EXPECT_EQ(net::ErrorToString(net::ERR_MANDATORY_PROXY_CONFIGURATION_FAILED),
             error);
 
   // No signal should've been emitted.
   EXPECT_FALSE(signal);
 }
 
 }  // namespace chromeos