Make aura::clients take Window instead of RootWindow

ui/views/widget/desktop_aura/desktop_drag_drop_client_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/desktop_aura/desktop_drag_drop_client_win.h"
 
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/drag_source_win.h"
 #include "ui/base/dragdrop/drop_target_event.h"
 #include "ui/base/dragdrop/os_exchange_data_provider_win.h"
 #include "ui/views/widget/desktop_aura/desktop_drop_target_win.h"
 #include "ui/views/widget/desktop_aura/desktop_root_window_host_win.h"
 #include "ui/views/widget/drop_target_win.h"
 
 namespace views {
 
 DesktopDragDropClientWin::DesktopDragDropClientWin(
-    aura::RootWindow* root_window,
+    aura::Window* root_window,
     HWND window)
     : drag_drop_in_progress_(false),
       drag_operation_(0) {
   drop_target_ = new DesktopDropTargetWin(root_window, window);
 }
 
 DesktopDragDropClientWin::~DesktopDragDropClientWin() {
 }
 
 int DesktopDragDropClientWin::StartDragAndDrop(
     const ui::OSExchangeData& data,
-    aura::RootWindow* root_window,
+    aura::Window* root_window,
     aura::Window* source_window,
     const gfx::Point& root_location,
     int operation,
     ui::DragDropTypes::DragEventSource source) {
   drag_drop_in_progress_ = true;
   drag_operation_ = operation;
 
   drag_source_ = new ui::DragSourceWin;
   DWORD effect;
   HRESULT result = DoDragDrop(
@@ skipping 28 matching lines @@
 }
 
 void DesktopDragDropClientWin::OnNativeWidgetDestroying(HWND window) {
   if (drop_target_.get()) {
     RevokeDragDrop(window);
     drop_target_ = NULL;
   }
 }
 
 }  // namespace views