Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/panel_drag_controller.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_PANEL_DRAG_CONTROLLER_H_
-#define CHROME_BROWSER_UI_PANELS_PANEL_DRAG_CONTROLLER_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "chrome/browser/ui/panels/panel_collection.h"
-#include "ui/gfx/geometry/vector2d.h"
-
-class Panel;
-class PanelCollection;
-class PanelManager;
-namespace gfx {
-class Point;
-class Rect;
-}
-
-// Controls all the drags initiated for all panels, including detaching,
-// docking, stacking, snapping and intra-collection dragging.
-class PanelDragController {
- public:
-  explicit PanelDragController(PanelManager* panel_manager);
-  ~PanelDragController();
-
-  // Drags the given panel.
-  // |mouse_location| is in screen coordinate system.
-  void StartDragging(Panel* panel, const gfx::Point& mouse_location);
-  void Drag(const gfx::Point& mouse_location);
-  void EndDragging(bool cancelled);
-
-  // Asynchronous confirmation of panel having been closed.
-  void OnPanelClosed(Panel* panel);
-
-  bool is_dragging() const { return dragging_panel_ != NULL; }
-  Panel* dragging_panel() const { return dragging_panel_; }
-
-  // For testing.
-  static int GetDetachDockedPanelThresholdForTesting();
-  static int GetDockDetachedPanelThresholdForTesting();
-  static int GetGluePanelDistanceThresholdForTesting();
-  static int GetGluePanelOverlapThresholdForTesting();
-  static int GetSnapPanelToScreenEdgeThresholdForTesting();
-
- private:
-  enum GlueAction {
-    STACK,
-    SNAP
-  };
-
-  enum GlueEdge {
-    TOP_EDGE,
-    BOTTOM_EDGE,
-    LEFT_EDGE,
-    RIGHT_EDGE
-  };
-
-  gfx::Point GetPanelPositionForMouseLocation(
-      const gfx::Point& mouse_location) const;
-
-  // |target_position| is in screen coordinate systems. It contains the proposed
-  //  panel origin to move to. Returns true if the request has been performed.
-  void TryDetach(const gfx::Point& target_position);
-  void TryDock(const gfx::Point& target_position);
-  void TryStack(const gfx::Point& target_position);
-  bool TryUnstackFromTop(const gfx::Point& target_position);
-  bool TryUnstackFromBottom(const gfx::Point& target_position);
-  void TrySnap(gfx::Point* target_position);
-
-  // Finds the panel that the dragging panel with |potential_position| could
-  // snap to or stack with. If such panel is found, |target_bounds| contains the
-  // new bounds for the dragging panel and |target_edge| contains the matched
-  // edge.
-  Panel* FindPanelToGlue(const gfx::Point& potential_position,
-                         GlueAction action,
-                         gfx::Rect* target_bounds,
-                         GlueEdge* target_edge) const;
-
-  // Moves the |panel| (and all panels below if it is in a stack) to a different
-  // collection.
-  void MovePanelAndBelowToCollection(
-      Panel* panel,
-      PanelCollection* target_collection,
-      PanelCollection::PositioningMask positioning_mask) const;
-
-  PanelManager* panel_manager_;  // Weak, owns us.
-  bool panel_stacking_enabled_;
-
-  // Panel currently being dragged.
-  Panel* dragging_panel_;
-
-  // The original panel collection when the drag is started.
-  PanelCollection* dragging_panel_original_collection_;
-
-  // The offset from mouse location to the panel position when the drag
-  // starts.
-  gfx::Vector2d offset_from_mouse_location_on_drag_start_;
-
-  DISALLOW_COPY_AND_ASSIGN(PanelDragController);
-};
-
-#endif  // CHROME_BROWSER_UI_PANELS_PANEL_DRAG_CONTROLLER_H_