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

chrome/browser/about_flags.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 "chrome/browser/about_flags.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <iterator>
@@ skipping 1230 matching lines @@
     ENABLE_DISABLE_VALUE_TYPE_AND_VALUE(
         switches::kOverscrollHistoryNavigation, "1",
         switches::kOverscrollHistoryNavigation, "0")
   },
 #endif
   {
     "enable-touch-drag-drop",
     IDS_FLAGS_ENABLE_TOUCH_DRAG_DROP_NAME,
     IDS_FLAGS_ENABLE_TOUCH_DRAG_DROP_DESCRIPTION,
     kOsWin | kOsCrOS,
-    SINGLE_VALUE_TYPE(switches::kEnableTouchDragDrop)
+    ENABLE_DISABLE_VALUE_TYPE(switches::kEnableTouchDragDrop,
+                              switches::kDisableTouchDragDrop)
   },
   {
     "enable-touch-editing",
     IDS_FLAGS_ENABLE_TOUCH_EDITING_NAME,
     IDS_FLAGS_ENABLE_TOUCH_EDITING_DESCRIPTION,
     kOsCrOS,
-    SINGLE_VALUE_TYPE(switches::kEnableTouchEditing)
+    ENABLE_DISABLE_VALUE_TYPE(switches::kEnableTouchEditing,
+                              switches::kDisableTouchEditing)
   },
 #if defined(ENABLE_MESSAGE_CENTER)
   {
     "enable-rich-notifications",
     IDS_FLAGS_ENABLE_RICH_NOTIFICATIONS_NAME,
     IDS_FLAGS_ENABLE_RICH_NOTIFICATIONS_DESCRIPTION,
     kOsWin | kOsCrOS,
     ENABLE_DISABLE_VALUE_TYPE(
         message_center::switches::kEnableRichNotifications,
         message_center::switches::kDisableRichNotifications)
@@ skipping 624 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags