Convert the re2 GYP targets to be generated by GN.

chrome/chrome_common.gypi

 # Copyright (c) 2013 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.
 
 {
   'targets': [
     {
       'target_name': 'common',
       'type': 'static_library',
       'variables': {
@@ skipping 409 matching lines @@
         ['OS != "ios"', {
           'dependencies': [
             '<(DEPTH)/chrome/common/extensions/api/api.gyp:api',
             '<(DEPTH)/components/components.gyp:autofill_core_common',
             '<(DEPTH)/components/components.gyp:autofill_content_common',
             '<(DEPTH)/components/nacl.gyp:nacl_common',
             '<(DEPTH)/components/components.gyp:visitedlink_common',
             '<(DEPTH)/extensions/extensions.gyp:extensions_common',
             '<(DEPTH)/ipc/ipc.gyp:ipc',
             '<(DEPTH)/third_party/adobe/flash/flash_player.gyp:flapper_version_h',
-            '<(DEPTH)/third_party/re2/re2.gyp:re2',
+            '<(DEPTH)/out/gn_gyp/third_party/re2/re2.gyp:re2',
             '<(DEPTH)/third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
           ],
         }, {  # OS == ios
           'sources/': [
             ['exclude', '^common/child_process_'],
             ['exclude', '^common/chrome_content_client\\.cc$'],
             ['exclude', '^common/chrome_version_info_posix\\.cc$'],
             ['exclude', '^common/common_message_generator\\.cc$'],
             ['exclude', '^common/common_param_traits'],
             ['exclude', '^common/custom_handlers/'],
@@ skipping 317 matching lines @@
         'common/metrics/proto/user_action_event.proto',
       ],
       'variables': {
         'proto_in_dir': 'common/metrics/proto',
         'proto_out_dir': 'chrome/common/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }