Remove SQLITE_NO_SYNC on Chrome OS

third_party/sqlite/sqlite.gyp

 # 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.
 
 {
   'variables': {
     'use_system_sqlite%': 0,
     'required_sqlite_version': '3.6.1',
   },
   'target_defaults': {
@@ skipping 123 matching lines @@
           'conditions': [
             ['OS == "win" and component == "shared_library"', {
               'defines': ['SQLITE_API=__declspec(dllexport)'],
               'direct_dependent_settings': {
                 'defines': ['SQLITE_API=__declspec(dllimport)'],
               },
             }],
             ['OS != "win" and component == "shared_library"', {
               'defines': ['SQLITE_API=__attribute__((visibility("default")))'],
             }],
-            [ 'chromeos==1' , {
-              'defines': [
-                # Despite obvious warnings about not using this flag in
-                # deployment, we are turning off sync in ChromeOS and relying on
-                # the underlying journaling filesystem to do error recovery
-                # properly.  It's much faster.
-                'SQLITE_NO_SYNC',
-              ],
-            }],
             ['os_posix == 1', {
               'defines': [
                 # Allow xSleep() call on Unix to use usleep() rather than
                 # sleep().  Microsecond precision is better than second
                 # precision.  Should only affect contended databases via the
                 # busy callback.  Browser profile databases are mostly
                 # exclusive, but renderer databases may allow for contention.
                 'HAVE_USLEEP=1',
                 # Use pread/pwrite directly rather than emulating them.
                 'USE_PREAD=1',
@@ skipping 110 matching lines @@
             'clang_warning_flags_unset': [
               # icu.c uses assert(!"foo") instead of assert(false && "foo")
               '-Wstring-conversion',
             ],
           },
         },
       ],
     }],
   ],
 }