Use ScopedTaskEnvironment instead of MessageLoopForUI in device tests.

device/geolocation/wifi_data_provider_linux_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 "device/geolocation/wifi_data_provider_linux.h"
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_task_environment.h"
 #include "dbus/message.h"
 #include "dbus/mock_bus.h"
 #include "dbus/mock_object_proxy.h"
 #include "dbus/object_path.h"
 #include "dbus/object_proxy.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using ::testing::Invoke;
@@ skipping 65 matching lines @@
     // ShutdownAndBlock() should be called.
     EXPECT_CALL(*mock_bus_.get(), ShutdownAndBlock()).WillOnce(Return());
 
     // Create the wlan API with the mock bus object injected.
     wifi_provider_linux_ = new WifiDataProviderLinux;
     wlan_api_ = wifi_provider_linux_->CreateWlanApiForTesting(mock_bus_.get());
     ASSERT_TRUE(wlan_api_);
   }
 
  protected:
+  GeolocationWifiDataProviderLinuxTest()
+      : scoped_task_environment_(
+            base::test::ScopedTaskEnvironment::MainThreadType::UI) {}
+
   // WifiDataProvider requires a task runner to be present. The |message_loop_|
   // is defined here, as it should outlive |wifi_provider_linux_|.
-  base::MessageLoopForUI message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   scoped_refptr<dbus::MockBus> mock_bus_;
   scoped_refptr<dbus::MockObjectProxy> mock_network_manager_proxy_;
   scoped_refptr<dbus::MockObjectProxy> mock_access_point_proxy_;
   scoped_refptr<dbus::MockObjectProxy> mock_device_proxy_;
   scoped_refptr<WifiDataProviderLinux> wifi_provider_linux_;
   std::unique_ptr<WifiDataProviderCommon::WlanApiInterface> wlan_api_;
 
  private:
   // Creates a response for |mock_network_manager_proxy_|.
   dbus::Response* CreateNetworkManagerProxyResponse(
@@ skipping 105 matching lines @@
   // Check the contents of the access point data.
   // The expected values come from CreateAccessPointProxyResponse() above.
   EXPECT_EQ("test", base::UTF16ToUTF8(access_point_data.ssid));
   EXPECT_EQ("00-11-22-33-44-55",
             base::UTF16ToUTF8(access_point_data.mac_address));
   EXPECT_EQ(-50, access_point_data.radio_signal_strength);
   EXPECT_EQ(4, access_point_data.channel);
 }
 
 }  // namespace device