ash: Fix flaky TrayIME* tests.

ash/test/virtual_keyboard_test_helper.cc

Index: ash/test/virtual_keyboard_test_helper.cc
diff --git a/ash/test/virtual_keyboard_test_helper.cc b/ash/test/virtual_keyboard_test_helper.cc
deleted file mode 100644
index f4ebb4076c4dc91fc978554bed51df1b95f93dc1..0000000000000000000000000000000000000000
--- a/ash/test/virtual_keyboard_test_helper.cc
+++ /dev/null
@@ -1,31 +0,0 @@
-// 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 "ash/test/virtual_keyboard_test_helper.h"
-
-#include "ui/events/devices/device_data_manager.h"
-#include "ui/events/devices/device_hotplug_event_observer.h"
-#include "ui/events/devices/input_device.h"
-#include "ui/events/devices/touchscreen_device.h"
-
-namespace ash {
-namespace test {
-
-void VirtualKeyboardTestHelper::SuppressKeyboard() {
-  ui::DeviceHotplugEventObserver* manager =
-      ui::DeviceDataManager::GetInstance();
-  std::vector<ui::TouchscreenDevice> screens;
-  screens.push_back(
-      ui::TouchscreenDevice(1, ui::InputDeviceType::INPUT_DEVICE_INTERNAL,
-                            "Touchscreen", gfx::Size(1024, 768), 0));
-  manager->OnTouchscreenDevicesUpdated(screens);
-
-  std::vector<ui::InputDevice> keyboards;
-  keyboards.push_back(ui::InputDevice(
-      2, ui::InputDeviceType::INPUT_DEVICE_EXTERNAL, "keyboard"));
-  manager->OnKeyboardDevicesUpdated(keyboards);
-}
-
-}  // namespace test
-}  // namespace ash