cros: Move TrayBluetoothHelper out of chrome into ash

ash/common/system/chromeos/bluetooth/tray_bluetooth_helper_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 "chrome/browser/ui/ash/tray_bluetooth_helper.h"
+#include "ash/common/system/chromeos/bluetooth/tray_bluetooth_helper.h"
 
 #include <vector>
 
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/test/ash_test_base.h"
 #include "device/bluetooth/dbus/bluez_dbus_manager.h"
 #include "device/bluetooth/dbus/fake_bluetooth_adapter_client.h"
 
 using bluez::BluezDBusManager;
 using bluez::FakeBluetoothAdapterClient;
 
-using TrayBluetoothHelperTest = ash::test::AshTestBase;
+namespace ash {
+namespace {
+
+using TrayBluetoothHelperTest = test::AshTestBase;
 
 // Tests basic functionality like turning Bluetooth on and off.
 TEST_F(TrayBluetoothHelperTest, Basics) {
   // Set Bluetooth discovery simulation delay to 0 so the test doesn't have to
   // wait or use timers.
   FakeBluetoothAdapterClient* adapter_client =
       static_cast<FakeBluetoothAdapterClient*>(
           BluezDBusManager::Get()->GetBluetoothAdapterClient());
   adapter_client->SetSimulationIntervalMs(0);
 
@@ skipping 23 matching lines @@
   helper.StopDiscovering();
   RunAllPendingInMessageLoop();
   EXPECT_FALSE(helper.HasDiscoverySession());
   EXPECT_FALSE(helper.IsDiscovering());
 
   // Turn Bluetooth off.
   helper.ToggleEnabled();
   RunAllPendingInMessageLoop();
   EXPECT_FALSE(helper.GetEnabled());
 }
+
+}  // namespace
+}  // namespace ash