Make touch drag drop and touch editing flags tri-state and turn them on by

ui/base/ui_base_switches_util.h

+// Copyright (c) 2013 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_BASE_UI_BASE_SWITCHES_UTIL_H_
+#define UI_BASE_UI_BASE_SWITCHES_UTIL_H_
+
+#include "base/compiler_specific.h"
+#include "ui/base/ui_export.h"
+
+namespace switches {
+
+UI_EXPORT bool IsTouchDragDropEnabled();
+UI_EXPORT bool IsTouchEditingEnabled();
+
+}  // namespace switches
+
+#endif  // UI_BASE_UI_BASE_SWITCHES_UTIL_H_