Get Polymer externs from closure/github (instead of Polymer/bower)

third_party/closure_compiler/compile.py

 #!/usr/bin/python
 # Copyright 2014 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.
 
 """Runs Closure compiler on JavaScript files to check for errors and produce
 minified output."""
 
 import argparse
 import os
@@ skipping 329 matching lines @@
 
   parser.set_defaults(single_file=True, strict=False)
   opts = parser.parse_args()
 
   depends = opts.depends or []
   # TODO(devlin): should we run normpath() on this first and/or do this for
   # depends as well?
   externs = set(opts.externs or [])
   sources = set(opts.sources)
 
-  polymer_externs = os.path.join(os.path.dirname(_CURRENT_DIR), 'polymer',
-                                 'v1_0', 'components-chromium',
-                                 'polymer-externs', 'polymer.externs.js')
-  externs.add(polymer_externs)
+  externs.add(os.path.join(_CURRENT_DIR, "externs", "polymer-1.0.js"))
 
   checker = Checker(verbose=opts.verbose, strict=opts.strict)
   if opts.single_file:
     for source in sources:
       # Normalize source to the current directory.
       source = os.path.normpath(os.path.join(os.getcwd(), source))
       depends, externs = build.inputs.resolve_recursive_dependencies(
           source, depends, externs)
 
       found_errors, _ = checker.check(source, out_file=opts.out_file,
                                       depends=depends, externs=externs,
                                       closure_args=opts.closure_args)
       if found_errors:
         sys.exit(1)
   else:
     found_errors, stderr = checker.check_multiple(
         sources,
         out_file=opts.out_file,
         externs=externs,
         closure_args=opts.closure_args)
     if found_errors:
       print stderr
       sys.exit(1)