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

ui/base/ui_base_switches_util.cc

+// 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.
+
+#include "ui/base/ui_base_switches_util.h"
+
+#include "base/command_line.h"
+#include "ui/base/ui_base_switches.h"
+
+namespace switches {
+
+bool IsTouchDragDropEnabled() {
+#if defined(OS_CHROMEOS)
+  return !CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kDisableTouchDragDrop);
+#else
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableTouchDragDrop);
+#endif
+}
+
+bool IsTouchEditingEnabled() {
+#if defined(OS_CHROMEOS)
+  return !CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kDisableTouchEditing);
+#else
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableTouchEditing);
+#endif
+}
+
+}  // namespace switches