It is time.

ui/views/corewm/tooltip.h

-// Copyright 2013 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_VIEWS_COREWM_TOOLTIP_H_
-#define UI_VIEWS_COREWM_TOOLTIP_H_
-
-#include "base/strings/string16.h"
-#include "ui/views/views_export.h"
-
-namespace aura {
-class Window;
-}
-
-namespace gfx {
-class Point;
-}
-
-namespace views {
-namespace corewm {
-
-// Tooltip is responsible for showing the tooltip in an appropriate manner.
-// Tooltip is used by TooltipController.
-class VIEWS_EXPORT Tooltip {
- public:
-  virtual ~Tooltip() {}
-
-  // Updates the text on the tooltip and resizes to fit.
-  virtual void SetText(aura::Window* window,
-                       const base::string16& tooltip_text,
-                       const gfx::Point& location) = 0;
-
-  // Shows the tooltip at the specified location (in screen coordinates).
-  virtual void Show() = 0;
-
-  // Hides the tooltip.
-  virtual void Hide() = 0;
-
-  // Is the tooltip visibile?
-  virtual bool IsVisible() = 0;
-};
-
-}  // namespace corewm
-}  // namespace views
-
-#endif  // UI_VIEWS_COREWM_TOOLTIP_H_