Turn app notifications sync to be on by default

chrome/browser/about_flags.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 "chrome/browser/about_flags.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 276 matching lines @@
     IDS_FLAGS_SYNC_TABS_NAME,
     IDS_FLAGS_SYNC_TABS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableSyncTabs)
   },
   {
     "sync-app-notifications",
     IDS_FLAGS_SYNC_APP_NOTIFICATIONS_NAME,
     IDS_FLAGS_SYNC_APP_NOTIFICATIONS_DESCRIPTION,
     kOsAll,
-    SINGLE_VALUE_TYPE(switches::kEnableSyncAppNotifications)
+    SINGLE_VALUE_TYPE(switches::kDisableSyncAppNotifications)
   },
   {
     "enable-smooth-scrolling",  // FLAGS:RECORD_UMA
     IDS_FLAGS_ENABLE_SMOOTH_SCROLLING_NAME,
     IDS_FLAGS_ENABLE_SMOOTH_SCROLLING_DESCRIPTION,
     // Can't expose the switch unless the code is compiled in.
     // On by default for the Mac (different implementation in WebKit).
     kOsWin | kOsLinux | kOsCrOS,
     SINGLE_VALUE_TYPE(switches::kEnableSmoothScrolling)
   },
@@ skipping 555 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags