chromeos: Move files in //ash/common to //ash, part 1

ash/common/system/user/button_from_view.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 ASH_COMMON_SYSTEM_USER_BUTTON_FROM_VIEW_H_
-#define ASH_COMMON_SYSTEM_USER_BUTTON_FROM_VIEW_H_
-
-#include <memory>
-
-#include "ash/common/system/tray/tray_popup_ink_drop_style.h"
-#include "base/macros.h"
-#include "ui/views/controls/button/custom_button.h"
-
-namespace views {
-class InkDropContainerView;
-}  // namespace views
-
-namespace ash {
-namespace tray {
-
-// This view is used to wrap it's content and transform it into button.
-class ButtonFromView : public views::CustomButton {
- public:
-  // The |content| is the content which is shown within the button. The
-  // |button_listener| will be informed - if provided - when a button was
-  // pressed.
-  ButtonFromView(views::View* content,
-                 views::ButtonListener* listener,
-                 TrayPopupInkDropStyle ink_drop_style);
-  ~ButtonFromView() override;
-
-  // views::View:
-  void OnMouseEntered(const ui::MouseEvent& event) override;
-  void OnMouseExited(const ui::MouseEvent& event) override;
-  void OnPaint(gfx::Canvas* canvas) override;
-  void OnFocus() override;
-  void OnBlur() override;
-  void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
-  void Layout() override;
-
-  // Check if the item is hovered.
-  bool is_hovered_for_test() { return button_hovered_; }
-
- protected:
-  // views::CustomButton:
-  void AddInkDropLayer(ui::Layer* ink_drop_layer) override;
-  void RemoveInkDropLayer(ui::Layer* ink_drop_layer) override;
-  std::unique_ptr<views::InkDrop> CreateInkDrop() override;
-  std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
-  std::unique_ptr<views::InkDropHighlight> CreateInkDropHighlight()
-      const override;
-  std::unique_ptr<views::InkDropMask> CreateInkDropMask() const override;
-
- private:
-  // Content of button.
-  views::View* content_;
-
-  // Defines the flavor of ink drop ripple/highlight that should be constructed.
-  TrayPopupInkDropStyle ink_drop_style_;
-
-  // True if button is hovered.
-  bool button_hovered_;
-
-  // A separate view is necessary to hold the ink drop layer so that |this| can
-  // host labels with subpixel anti-aliasing enabled.
-  views::InkDropContainerView* ink_drop_container_;
-
-  std::unique_ptr<views::InkDropMask> ink_drop_mask_;
-
-  DISALLOW_COPY_AND_ASSIGN(ButtonFromView);
-};
-
-}  // namespace tray
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_USER_BUTTON_FROM_VIEW_H_