Revert of Convert the re2 GYP targets to be generated by GN.

third_party/leveldatabase/leveldatabase.gyp

 # Copyright (c) 2011 The LevelDB Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file. See the AUTHORS file for names of contributors.
 
 {
   'variables': {
     'use_snappy%': 1,
   },
   'conditions': [
     ['OS == "android" and android_webview_build == 1', {
@@ skipping 23 matching lines @@
   },
   'targets': [
     {
       'target_name': 'leveldatabase',
       'type': 'static_library',
       'dependencies': [
         '../../base/base.gyp:base',
         # base::LazyInstance is a template that pulls in dynamic_annotations so
         # we need to explictly link in the code for dynamic_annotations.
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
-        '../../out/gn_gyp/third_party/re2/re2.gyp:re2',
+        '../re2/re2.gyp:re2',
       ],
       'conditions': [
         ['use_snappy', {
           'dependencies': [
             '../../third_party/snappy/snappy.gyp:snappy',
           ],
         }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [
@@ skipping 310 matching lines @@
       ],
     },
   ],
 }
 
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