Remove third_party/polymer from .gitignore

third_party/polymer/v1_0/PRESUBMIT.py

 # Copyright 2015 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.
 
 """Chromium presubmit script for third_party/polymer/v1_0.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details on the presubmit API built into depot_tools.
 """
 
 import os
 import json
 
 def _CheckBowerDependencies(input_api, output_api):
   os_path = input_api.os_path
   cwd = input_api.PresubmitLocalPath()
-  components_dir = os_path.join(cwd, 'components')
+  components_dir = os_path.join(cwd, 'components-chromium')
   bower_json_path = os_path.join(cwd, 'bower.json')
 
   for f in input_api.AffectedFiles(include_dirs=True):
     p = f.AbsoluteLocalPath()
     if p == bower_json_path or p.startswith(components_dir):
       break
   else:
       return []
 
   bower_dependencies = \
@@ skipping 20 matching lines @@
 
   return problems
 
 
 def CheckChangeOnUpload(input_api, output_api):
   return _CheckBowerDependencies(input_api, output_api)
 
 
 def CheckChangeOnCommit(input_api, output_api):
   return _CheckBowerDependencies(input_api, output_api)