Implement hit tests/client area.

ui/views/widget/desktop_aura/desktop_window_tree_host.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_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_H_
 
 #include <memory>
 
 #include "ui/aura/window_event_dispatcher.h"
@@ skipping 110 matching lines @@
   virtual void ClearNativeFocus() = 0;
 
   virtual Widget::MoveLoopResult RunMoveLoop(
       const gfx::Vector2d& drag_offset,
       Widget::MoveLoopSource source,
       Widget::MoveLoopEscapeBehavior escape_behavior) = 0;
   virtual void EndMoveLoop() = 0;
 
   virtual void SetVisibilityChangedAnimationsEnabled(bool value) = 0;
 
+  virtual NonClientFrameView* CreateNonClientFrameView() = 0;
+
   // Determines whether the window should use native title bar and borders.
   virtual bool ShouldUseNativeFrame() const = 0;
   // Determines whether the window contents should be rendered transparently
   // (for example, so that they can overhang onto the window title bar).
   virtual bool ShouldWindowContentsBeTransparent() const = 0;
   virtual void FrameTypeChanged() = 0;
 
   virtual void SetFullscreen(bool fullscreen) = 0;
   virtual bool IsFullscreen() const = 0;
 
@@ skipping 13 matching lines @@
   // Returns true if the Widget supports translucency.
   virtual bool IsTranslucentWindowOpacitySupported() const = 0;
 
   // Called when the window's size constraints change.
   virtual void SizeConstraintsChanged() = 0;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_H_