Desktop Aura: Allow tab drags out of window.

ui/views/widget/native_widget_win.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_NATIVE_WIDGET_WIN_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlcrack.h>
@@ skipping 240 matching lines @@
   virtual void RunShellDrag(View* view,
                             const ui::OSExchangeData& data,
                             const gfx::Point& location,
                             int operation) OVERRIDE;
   virtual void SchedulePaintInRect(const gfx::Rect& rect) OVERRIDE;
   virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
   virtual void ClearNativeFocus() OVERRIDE;
   virtual void FocusNativeView(gfx::NativeView native_view) OVERRIDE;
   virtual gfx::Rect GetWorkAreaBoundsInScreen() const OVERRIDE;
   virtual void SetInactiveRenderingDisabled(bool value) OVERRIDE;
-  virtual Widget::MoveLoopResult RunMoveLoop() OVERRIDE;
+  virtual Widget::MoveLoopResult RunMoveLoop(
+      const gfx::Point& drag_offset) OVERRIDE;
   virtual void EndMoveLoop() OVERRIDE;
   virtual void SetVisibilityChangedAnimationsEnabled(bool value) OVERRIDE;
 
  protected:
   // Information saved before going into fullscreen mode, used to restore the
   // window afterwards.
   struct SavedWindowInfo {
     bool maximized;
     LONG style;
     LONG ex_style;
@@ skipping 409 matching lines @@
 
   // The set of touch devices currently down.
   TouchIDs touch_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetWin);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_