views: Update event-related API to use PointF/RectF instead of Point/Rect.

ui/views/drag_controller.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_DRAG_CONTROLLER_H_
 #define UI_VIEWS_DRAG_CONTROLLER_H_
 
 #include "ui/views/views_export.h"
 
 namespace gfx {
 class Point;
 }
 
 namespace ui {
 class OSExchangeData;
 }
 
 namespace views {
 class View;
 
 // DragController is responsible for writing drag data for a view, as well as
 // supplying the supported drag operations. Use DragController if you don't
 // want to subclass.
 class VIEWS_EXPORT DragController {
  public:
   // Writes the data for the drag.
   virtual void WriteDragDataForView(View* sender,
-                                    const gfx::Point& press_pt,
+                                    const gfx::PointF& press_pt,
                                     ui::OSExchangeData* data) = 0;
 
   // Returns the supported drag operations (see DragDropTypes for possible
   // values). A drag is only started if this returns a non-zero value.
-  virtual int GetDragOperationsForView(View* sender,
-                                       const gfx::Point& p) = 0;
+  virtual int GetDragOperationsForView(View* sender, const gfx::PointF& p) = 0;
 
   // Returns true if a drag operation can be started.
   // |press_pt| represents the coordinates where the mouse was initially
   // pressed down. |p| is the current mouse coordinates.
   virtual bool CanStartDragForView(View* sender,
-                                   const gfx::Point& press_pt,
-                                   const gfx::Point& p) = 0;
+                                   const gfx::PointF& press_pt,
+                                   const gfx::PointF& p) = 0;
 
  protected:
   virtual ~DragController() {}
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_DRAG_CONTROLLER_H_