Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/panel_bounds_animation.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 CHROME_BROWSER_UI_PANELS_PANEL_BOUNDS_ANIMATION_H_
-#define CHROME_BROWSER_UI_PANELS_PANEL_BOUNDS_ANIMATION_H_
-
-#include "base/macros.h"
-#include "ui/gfx/animation/linear_animation.h"
-
-namespace gfx {
-class AnimationDelegate;
-}
-class Panel;
-
-class PanelBoundsAnimation : public gfx::LinearAnimation {
- public:
-  PanelBoundsAnimation(gfx::AnimationDelegate* target,
-                       Panel* panel,
-                       const gfx::Rect& initial_bounds,
-                       const gfx::Rect& final_bounds);
-  ~PanelBoundsAnimation() override;
-  double GetCurrentValue() const override;
-
-  // Static because it is reused on Mac to override NSAnimation's calculation.
-  static double ComputeAnimationValue(double progress,
-                                      bool for_big_minimize,
-                                      double animation_stop_to_show_titlebar);
-
- protected:
-  void AnimateToState(double state) override {}
-
- private:
-  Panel* panel_;  // Weak, owns us.
-  bool for_big_minimize_;
-  double animation_stop_to_show_titlebar_;
-
-  DISALLOW_COPY_AND_ASSIGN(PanelBoundsAnimation);
-};
-
-#endif  // CHROME_BROWSER_UI_PANELS_PANEL_BOUNDS_ANIMATION_H_