Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/detached_panel_collection.h

-// Copyright (c) 2012 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_DETACHED_PANEL_COLLECTION_H_
-#define CHROME_BROWSER_UI_PANELS_DETACHED_PANEL_COLLECTION_H_
-
-#include <list>
-
-#include "base/macros.h"
-#include "chrome/browser/ui/panels/panel.h"
-#include "chrome/browser/ui/panels/panel_collection.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-
-class PanelManager;
-
-// This class manages a group of free-floating panels.
-class DetachedPanelCollection : public PanelCollection {
- public:
-  typedef std::list<Panel*> Panels;
-  typedef bool (*PanelsComparer)(Panel* panel1, Panel* panel2);
-
-  explicit DetachedPanelCollection(PanelManager* panel_manager);
-  ~DetachedPanelCollection() override;
-
-  // PanelCollection OVERRIDES:
-  void OnDisplayChanged() override;
-  void RefreshLayout() override;
-  void AddPanel(Panel* panel, PositioningMask positioning_mask) override;
-  void RemovePanel(Panel* panel, RemovalReason reason) override;
-  void CloseAll() override;
-  void ResizePanelWindow(Panel* panel,
-                         const gfx::Size& preferred_window_size) override;
-  panel::Resizability GetPanelResizability(const Panel* panel) const override;
-  void OnPanelResizedByMouse(Panel* panel,
-                             const gfx::Rect& new_bounds) override;
-  void OnPanelAttentionStateChanged(Panel* panel) override;
-  void OnPanelTitlebarClicked(Panel* panel,
-                              panel::ClickModifier modifier) override;
-  void ActivatePanel(Panel* panel) override;
-  void MinimizePanel(Panel* panel) override;
-  void RestorePanel(Panel* panel) override;
-  void OnMinimizeButtonClicked(Panel* panel,
-                               panel::ClickModifier modifier) override;
-  void OnRestoreButtonClicked(Panel* panel,
-                              panel::ClickModifier modifier) override;
-  bool CanShowMinimizeButton(const Panel* panel) const override;
-  bool CanShowRestoreButton(const Panel* panel) const override;
-  bool IsPanelMinimized(const Panel* panel) const override;
-  bool UsesAlwaysOnTopPanels() const override;
-  void SavePanelPlacement(Panel* panel) override;
-  void RestorePanelToSavedPlacement() override;
-  void DiscardSavedPanelPlacement() override;
-  void UpdatePanelOnCollectionChange(Panel* panel) override;
-  void OnPanelExpansionStateChanged(Panel* panel) override;
-  void OnPanelActiveStateChanged(Panel* panel) override;
-  gfx::Rect GetInitialPanelBounds(
-      const gfx::Rect& requested_bounds) const override;
-
-  bool HasPanel(Panel* panel) const;
-
-  void SortPanels(PanelsComparer comparer);
-
-  int num_panels() const { return panels_.size(); }
-  const Panels& panels() const { return panels_; }
-
-  // Returns default top-left to use for a detached panel whose position is
-  // not specified during panel creation.
-  gfx::Point GetDefaultPanelOrigin();
-
- private:
-  // Offset the default panel top-left position by kPanelTilePixels. Wrap
-  // around to initial position if position goes beyond display area.
-  void ComputeNextDefaultPanelOrigin();
-
-  struct PanelPlacement {
-    Panel* panel;
-    gfx::Point position;
-
-    PanelPlacement() : panel(NULL) { }
-  };
-
-  PanelManager* panel_manager_;  // Weak, owns us.
-
-  // Collection of all panels.
-  Panels panels_;
-
-  // Used to save the placement information for a panel.
-  PanelPlacement saved_panel_placement_;
-
-  // Default top-left position to use for next detached panel if position is
-  // unspecified by panel creator.
-  gfx::Point default_panel_origin_;
-
-  DISALLOW_COPY_AND_ASSIGN(DetachedPanelCollection);
-};
-
-#endif  // CHROME_BROWSER_UI_PANELS_DETACHED_PANEL_COLLECTION_H_