Rename WindowDragDropDelegate->DragDropDelegate

ui/aura/client/drag_drop_client.cc

+// Copyright (c) 2011 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/aura/client/drag_drop_client.h"
+
+#include "ui/aura/client/aura_constants.h"
+#include "ui/aura/root_window.h"
+
+namespace aura {
+namespace client {
+
+void SetDragDropClient(DragDropClient* client) {
+  RootWindow::GetInstance()->SetProperty(kRootWindowDragDropClientKey, client);
+}
+
+DragDropClient* GetDragDropClient() {
+  return reinterpret_cast<DragDropClient*>(
+      RootWindow::GetInstance()->GetProperty(kRootWindowDragDropClientKey));
+}
+
+}  // namespace client
+}  // namespace aura