[CrOS Tether] Create proto_test_util.cc/h and move CreateTestDeviceStatus() there.

chromeos/components/tether/message_transfer_operation_unittest.cc

 // Copyright 2017 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/components/tether/message_transfer_operation.h"
 
 #include "base/timer/mock_timer.h"
 #include "chromeos/components/tether/fake_ble_connection_manager.h"
 #include "chromeos/components/tether/message_wrapper.h"
+#include "chromeos/components/tether/proto_test_util.h"
 #include "chromeos/components/tether/timer_factory.h"
 #include "components/cryptauth/remote_device_test_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromeos {
 
 namespace tether {
 
 namespace {
@@ skipping 120 matching lines @@
       const std::string& device_id_for_next_timer) {
     device_id_for_next_timer_ = device_id_for_next_timer;
   }
 
  private:
   std::string device_id_for_next_timer_;
   std::unordered_map<std::string, base::MockTimer*> device_id_to_timer_map_;
 };
 
 DeviceStatus CreateFakeDeviceStatus() {
-  WifiStatus wifi_status;
-  wifi_status.set_status_code(
-      WifiStatus_StatusCode::WifiStatus_StatusCode_CONNECTED);
-  wifi_status.set_ssid("Google A");
-
-  DeviceStatus device_status;
-  device_status.set_battery_percentage(75);
-  device_status.set_cell_provider("Google Fi");
-  device_status.set_connection_strength(4);
-  device_status.mutable_wifi_status()->CopyFrom(wifi_status);
-
-  return device_status;
+  return CreateTestDeviceStatus("Google Fi", 75 /* battery_percentage */,
+                                4 /* connection_strength */);
 }
 
 TetherAvailabilityResponse CreateTetherAvailabilityResponse() {
   TetherAvailabilityResponse response;
   response.set_response_code(
       TetherAvailabilityResponse_ResponseCode::
           TetherAvailabilityResponse_ResponseCode_TETHER_AVAILABLE);
   response.mutable_device_status()->CopyFrom(CreateFakeDeviceStatus());
   return response;
 }
@@ skipping 428 matching lines @@
   fake_ble_connection_manager_->SetDeviceStatus(
       test_devices_[3], cryptauth::SecureChannel::Status::DISCONNECTED);
   EXPECT_FALSE(operation_->HasDeviceAuthenticated(test_devices_[3]));
   EXPECT_FALSE(IsDeviceRegistered(test_devices_[3]));
   EXPECT_FALSE(GetResponseTimerForDevice(test_devices_[3]));
 }
 
 }  // namespace tether
 
 }  // namespace chromeos