Consolidate Widget Event code, other cleanup.

views/widget/native_widget_delegate.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 VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
 #define VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
 #pragma once
 
 namespace gfx {
 class Canvas;
@@ skipping 22 matching lines @@
 
   // Called when the NativeWidget changed size to |new_size|.
   virtual void OnSizeChanged(const gfx::Size& new_size) = 0;
 
   // Returns true if the delegate has a FocusManager.
   virtual bool HasFocusManager() const = 0;
 
   // Paints the rootview in the canvas. This will also refresh the compositor
   // tree if necessary when accelerated painting is enabled.
   virtual void OnNativeWidgetPaint(gfx::Canvas* canvas) = 0;
+
+  // MouseEvent handlers.
+  virtual bool OnMouseEvent(const MouseEvent& event) = 0;
+  virtual void OnMouseCaptureLost() = 0;
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_