Draggable region support for frameless app window on CrOS.

ui/aura/window_delegate.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_AURA_WINDOW_DELEGATE_H_
 #define UI_AURA_WINDOW_DELEGATE_H_
 
 #include "ui/aura/aura_export.h"
 #include "ui/base/events.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 36 matching lines @@
   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) = 0;
 
   // Returns the non-client component (see hit_test.h) containing |point|, in
   // window coordinates.
   virtual int GetNonClientComponent(const gfx::Point& point) const = 0;
 
   // Returns true if event handling should descend into |child|. |location| is
   // in terms of the Window.
   virtual bool ShouldDescendIntoChildForEventHandling(
       Window* child,
-      const gfx::Point& location) = 0;
+      const gfx::Point& event_location,
+      ui::EventType event_type) = 0;
 
   virtual bool OnMouseEvent(ui::MouseEvent* event) = 0;
 
   virtual ui::TouchStatus OnTouchEvent(ui::TouchEvent* event) = 0;
 
   virtual ui::GestureStatus OnGestureEvent(ui::GestureEvent* event) = 0;
 
   // Returns true of the window can be focused.
   virtual bool CanFocus() = 0;
 
@@ skipping 32 matching lines @@
   // above returns true.
   virtual void GetHitTestMask(gfx::Path* mask) const = 0;
 
  protected:
   virtual ~WindowDelegate() {}
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_DELEGATE_H_