Rename "test" ozone platform to "headless"

ui/ozone/platform/test/test_window.h

-// 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.
-
-#ifndef UI_OZONE_PLATFORM_TEST_TEST_WINDOW_H_
-#define UI_OZONE_PLATFORM_TEST_TEST_WINDOW_H_
-
-#include "base/files/file_path.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/platform_window/platform_window.h"
-
-namespace ui {
-
-class PlatformWindowDelegate;
-class TestWindowManager;
-
-class TestWindow : public PlatformWindow {
- public:
-  TestWindow(PlatformWindowDelegate* delegate,
-             TestWindowManager* manager,
-             const gfx::Rect& bounds);
-  ~TestWindow() override;
-
-  // Path for image file for this window.
-  base::FilePath path();
-
-  // PlatformWindow:
-  gfx::Rect GetBounds() override;
-  void SetBounds(const gfx::Rect& bounds) override;
-  void SetTitle(const base::string16& title) override;
-  void Show() override;
-  void Hide() override;
-  void Close() override;
-  void SetCapture() override;
-  void ReleaseCapture() override;
-  void ToggleFullscreen() override;
-  void Maximize() override;
-  void Minimize() override;
-  void Restore() override;
-  void SetCursor(PlatformCursor cursor) override;
-  void MoveCursorTo(const gfx::Point& location) override;
-  void ConfineCursorToBounds(const gfx::Rect& bounds) override;
-  PlatformImeController* GetPlatformImeController() override;
-
- private:
-  PlatformWindowDelegate* delegate_;
-  TestWindowManager* manager_;
-  gfx::Rect bounds_;
-  gfx::AcceleratedWidget widget_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestWindow);
-};
-
-}  // namespace ui
-
-#endif  // UI_OZONE_PLATFORM_TEST_TEST_WINDOW_H_