Reland change for aura tooltips that was revert due to build break:

ui/views/widget/tooltip_manager_views.h

-// Copyright (c) 2011 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_WIDGET_TOOLTIP_MANAGER_VIEWS_H_
-#define UI_VIEWS_WIDGET_TOOLTIP_MANAGER_VIEWS_H_
-#pragma once
-
-#include "base/message_loop.h"
-#include "base/timer.h"
-#include "ui/views/controls/label.h"
-#include "ui/views/view.h"
-#include "ui/views/widget/native_widget.h"
-#include "ui/views/widget/tooltip_manager.h"
-#include "ui/views/widget/widget_delegate.h"
-
-#if defined(USE_X11)
-typedef union _XEvent XEvent;
-#endif
-
-namespace views {
-
-class MouseEvent;
-class Widget;
-
-// TooltipManager implementation for Views.
-class TooltipManagerViews : public TooltipManager {
- public:
-  explicit TooltipManagerViews(views::View* root_view);
-  virtual ~TooltipManagerViews();
-
-  // Updates the state of the tooltip based on the mouse event. The mouse event
-  // is the same event that goes to a Widget (i.e. it is in the Widget's
-  // coordinate system).
-  void UpdateForMouseEvent(const MouseEvent& event);
-
-  // TooltipManager.
-  virtual void UpdateTooltip() OVERRIDE;
-  virtual void TooltipTextChanged(View* view) OVERRIDE;
-  virtual void ShowKeyboardTooltip(View* view) OVERRIDE;
-  virtual void HideKeyboardTooltip() OVERRIDE;
-
- private:
-  void TooltipTimerFired();
-  View* GetViewForTooltip(int x, int y, bool for_keyboard);
-
-  // Updates the tooltip if required (if there is any change in the tooltip
-  // text or the view.
-  void UpdateIfRequired(int x, int y, bool for_keyboard);
-
-  // Updates the tooltip. Gets the tooltip text from tooltip_view_ and displays
-  // it at the current mouse position.
-  void Update();
-
-  // Adjusts the bounds given by the arguments to fit inside the parent view
-  // and applies the adjusted bounds to the tooltip_label_.
-  void SetTooltipBounds(gfx::Point mouse_pos, int tooltip_width,
-                        int tooltip_height);
-
-  // Creates a widget of type TYPE_TOOLTIP
-  Widget* CreateTooltip();
-
-  // Invoked when the mose moves.
-  void OnMouseMoved(int x, int y);
-
-  scoped_ptr<Widget> tooltip_widget_;
-  views::View* root_view_;
-  View* tooltip_view_;
-  string16 tooltip_text_;
-  Label tooltip_label_;
-
-  gfx::Point curr_mouse_pos_;
-  base::RepeatingTimer<TooltipManagerViews> tooltip_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(TooltipManagerViews);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_WIDGET_TOOLTIP_MANAGER_VIEWS_H_