Ensure tests have an active task runner

components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator_unittest.cc

 // 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 "components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.h"
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
@@ skipping 32 matching lines @@
         config_->GetProxyConfig().proxy_rules();
     ASSERT_EQ(expected_rules_type, rules.type);
     if (net::ProxyConfig::ProxyRules::TYPE_PROXY_PER_SCHEME ==
         expected_rules_type) {
       ASSERT_EQ(expected_http_proxies, rules.proxies_for_http.ToPacString());
       ASSERT_EQ(expected_https_proxies, rules.proxies_for_https.ToPacString());
       ASSERT_EQ(expected_bypass_list, rules.bypass_rules.ToString());
     }
   }
 
+  base::MessageLoop message_loop_;
   scoped_ptr<DataReductionProxyTestContext> test_context_;
   scoped_ptr<DataReductionProxyConfigurator> config_;
 };
 
 TEST_F(DataReductionProxyConfiguratorTest, TestUnrestricted) {
   config_->Enable(false,
                   false,
                   "https://www.foo.com:443/",
                   "http://www.bar.com:80/",
                   "");
@@ skipping 151 matching lines @@
 
   ASSERT_EQ(config_->bypass_rules_.size(), 6u);
   int i = 0;
   for (std::vector<std::string>::iterator it = config_->bypass_rules_.begin();
        it != config_->bypass_rules_.end(); ++it) {
     EXPECT_EQ(expected[i++], *it);
   }
 }
 
 }  // namespace data_reduction_proxy