mash: Migrate ShelfTooltipManager to wm common types.

ash/common/wm_window.h

 // Copyright 2016 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_WM_WINDOW_H_
 #define ASH_COMMON_WM_WINDOW_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 10 matching lines @@
 }
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 class Transform;
 }
 
 namespace ui {
+class EventHandler;
 class Layer;
 }
 
 namespace views {
 class View;
 class Widget;
 }
 
 namespace ash {
 
 class WmLayoutManager;
 class WmRootWindowController;
 class WmShell;
 class WmWindowObserver;
 enum class WmWindowProperty;
 
 namespace wm {
-class WMEvent;
 class WindowState;
 }
 
 // This class exists as a porting layer to allow ash/wm to work with
 // aura::Window or ui::Window. See aura::Window for details on the functions.
 class ASH_EXPORT WmWindow {
  public:
   // See comments in SetBoundsInScreen().
   enum class BoundsInScreenBehavior {
     USE_LOCAL_COORDINATES,
@@ skipping 218 matching lines @@
   // container. This is used by SetBoundsInScreen().
   virtual void SetDescendantsStayInSameRootWindow(bool value) = 0;
 
   // Returns a View that renders the contents of this window's layers.
   virtual std::unique_ptr<views::View> CreateViewWithRecreatedLayers() = 0;
 
   virtual void AddObserver(WmWindowObserver* observer) = 0;
   virtual void RemoveObserver(WmWindowObserver* observer) = 0;
   virtual bool HasObserver(const WmWindowObserver* observer) const = 0;
 
+  // Adds or removes a handler to receive events targeted at this window, before
+  // this window handles the events itself; the handler does not recieve events
+  // from embedded windows. This only supports windows with associated widgets.

[sky, 2016/07/26 21:07:20]

associated -> internal
And a comment to see GetInternalWidget().

[msw, 2016/07/26 21:17:19]

Done.

+  // Ownership of the handler is not transferred.
+  virtual void AddLimitedPreTargetHandler(ui::EventHandler* handler) = 0;
+  virtual void RemoveLimitedPreTargetHandler(ui::EventHandler* handler) = 0;
+
  protected:
   virtual ~WmWindow() {}
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_WINDOW_H_