Moves WorkspaceEventHandler to ash/common

ash/wm/workspace/workspace_event_handler.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 ASH_WM_WORKSPACE_WORKSPACE_EVENT_HANDLER_H_
-#define ASH_WM_WORKSPACE_WORKSPACE_EVENT_HANDLER_H_
-
-#include "ash/common/wm/workspace/multi_window_resize_controller.h"
-#include "base/macros.h"
-#include "ui/events/event_handler.h"
-
-namespace ash {
-class WorkspaceEventHandlerTestHelper;
-
-namespace wm {
-class WindowState;
-}
-
-class WorkspaceEventHandler : public ui::EventHandler {
- public:
-  WorkspaceEventHandler();
-  ~WorkspaceEventHandler() override;
-
-  // ui::EventHandler:
-  void OnMouseEvent(ui::MouseEvent* event) override;
-  void OnGestureEvent(ui::GestureEvent* event) override;
-
- private:
-  friend class WorkspaceEventHandlerTestHelper;
-
-  // Determines if |event| corresponds to a double click on either the top or
-  // bottom vertical resize edge, and if so toggles the vertical height of the
-  // window between its restored state and the full available height of the
-  // workspace.
-  void HandleVerticalResizeDoubleClick(wm::WindowState* window_state,
-                                       ui::MouseEvent* event);
-
-  MultiWindowResizeController multi_window_resize_controller_;
-
-  // The non-client component for the target of a MouseEvent or GestureEvent.
-  // Events can be destructive to the window tree, which can cause the
-  // component of a ui::EF_IS_DOUBLE_CLICK event to no longer be the same as
-  // that of the initial click. Acting on a double click should only occur for
-  // matching components. This will be set for left clicks, and tap events.
-  int click_component_;
-
-  DISALLOW_COPY_AND_ASSIGN(WorkspaceEventHandler);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_WORKSPACE_WORKSPACE_EVENT_HANDLER_H_