Make FTS2 inclusion in SQLite optional

sql/sql.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': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 97 matching lines @@
                 '../base/allocator/allocator.gyp:allocator',
               ],
             }],
           ],
         }],
         ['OS == "android"', {
           'dependencies': [
             '../testing/android/native_test.gyp:native_test_native_code',
           ],
         }],
+        ['sqlite_enable_fts2', {
+          'defines': [
+            'SQLITE_ENABLE_FTS2',
+          ],
+        }],
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [4267, ],
     },
   ],
   'conditions': [
     ['OS == "android"', {
       'targets': [
         {
           'target_name': 'sql_unittests_apk',
@@ skipping 20 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'sql_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }