views: Dispatch mouse events using EventDispatch interface too.

ui/views/widget/root_view.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 UI_VIEWS_WIDGET_ROOT_VIEW_H_
 #define UI_VIEWS_WIDGET_ROOT_VIEW_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 99 matching lines @@
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
   virtual void ReorderChildLayers(ui::Layer* parent_layer) OVERRIDE;
 
  protected:
   // Overridden from View:
   virtual void ViewHierarchyChanged(bool is_add, View* parent,
                                     View* child) OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual gfx::Vector2d CalculateOffsetToAncestorWithLayer(
       ui::Layer** layer_parent) OVERRIDE;
+  virtual View::DragInfo* GetDragInfo() OVERRIDE;
 
  private:
   friend class View;
   friend class Widget;
 
   // Input ---------------------------------------------------------------------
 
   // Update the cursor given a mouse event. This is called by non mouse_move
   // event handlers to honor the cursor desired by views located under the
   // cursor during drag operations. The location of the mouse should be in the
   // current coordinate system (i.e. any necessary transformation should be
   // applied to the point prior to calling this).
   void UpdateCursor(const ui::MouseEvent& event);
 
   // Updates the last_mouse_* fields from e. The location of the mouse should be
   // in the current coordinate system (i.e. any necessary transformation should
   // be applied to the point prior to calling this).
   void SetMouseLocationAndFlags(const ui::MouseEvent& event);
 
   void DispatchEventToTarget(View* target, ui::Event* event);
 
+  // |view| is the view receiving |event|. This function sends the event to all
+  // the Views up the hierarchy that has |notify_enter_exit_on_child_| flag
+  // turned on, but does not contain |sibling|.
+  void NotifyEnterExitOfDescendant(const ui::MouseEvent& event,
+                                   ui::EventType type,
+                                   View* view,
+                                   View* sibling);
+
   // Overridden from ui::EventDispatcherDelegate:
   virtual bool CanDispatchToTarget(ui::EventTarget* target) OVERRIDE;
 
   //////////////////////////////////////////////////////////////////////////////
 
   // Tree operations -----------------------------------------------------------
 
   // The host Widget
   Widget* widget_;
 
@@ skipping 51 matching lines @@
   // Tracks drag state for a view.
   View::DragInfo drag_info_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(RootView);
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_ROOT_VIEW_H_