Get rid of Widget::ConvertPointFromAncestor.

ui/views/widget/widget.h

 // Copyright (c) 2011 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_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 #pragma once
 
 #include <set>
 #include <stack>
@@ skipping 532 matching lines @@
   // Sets-up the focus manager with the view that should have focus when the
   // window is shown the first time.  Returns true if the initial focus has been
   // set or the widget should not set the initial focus, or false if the caller
   // should set the initial focus (if any).
   bool SetInitialFocus();
 
   void set_focus_on_creation(bool focus_on_creation) {
     focus_on_creation_ = focus_on_creation;
   }
 
-  // Converts the |point| in ancestor's coordinate to this widget's coordinates.
-  // Returns false if |ancestor| is not an ancestor of this widget.
-  // The receiver has to be pure views widget (NativeWidgetViews) and
-  // ancestor can be of any type.
-  bool ConvertPointFromAncestor(
-      const Widget* ancestor, gfx::Point* point) const;
-
   // Returns a View* that any child Widgets backed by NativeWidgetViews
   // are added to.  The default implementation returns the contents view
   // if it exists and the root view otherwise.
   virtual View* GetChildViewParent();
 
   // True if the widget is considered top level widget. Top level widget
   // is a widget of TYPE_WINDOW, TYPE_WINDOW_FRAMELESS, BUBBLE, POPUP or MENU,
   // and has a focus manager and input method object associated with it.
   // TYPE_CONTROL and TYPE_TOOLTIP is not considered top level.
   bool is_top_level() const { return is_top_level_; }
@@ skipping 163 matching lines @@
   // duplicate move events even though the mouse hasn't moved.
   bool last_mouse_event_was_move_;
   gfx::Point last_mouse_event_position_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_