Desktop Aura: Allow tab drags out of window.

ui/views/widget/native_widget_win.cc

 // 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.
 
 #include "ui/views/widget/native_widget_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include <algorithm>
@@ skipping 1156 matching lines @@
     ::SetFocus(native_view);
 }
 
 gfx::Rect NativeWidgetWin::GetWorkAreaBoundsInScreen() const {
   return gfx::Screen::GetDisplayNearestWindow(GetNativeView()).work_area();
 }
 
 void NativeWidgetWin::SetInactiveRenderingDisabled(bool value) {
 }
 
-Widget::MoveLoopResult NativeWidgetWin::RunMoveLoop() {
+Widget::MoveLoopResult NativeWidgetWin::RunMoveLoop(
+    const gfx::Point& drag_offset) {
   ReleaseCapture();
   MoveLoopMouseWatcher watcher(this);
   SendMessage(hwnd(), WM_SYSCOMMAND, SC_MOVE | 0x0002, GetMessagePos());
   // Windows doesn't appear to offer a way to determine whether the user
   // canceled the move or not. We assume if the user released the mouse it was
   // successful.
   return watcher.got_mouse_up() ? Widget::MOVE_LOOP_SUCCESSFUL :
       Widget::MOVE_LOOP_CANCELED;
 }
 
@@ skipping 1582 matching lines @@
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   // This currently isn't necessary because we're not generating touch events on
   // windows.  When we do, this will need to be updated.
   return false;
 }
 
 }  // namespace internal
 
 }  // namespace views