Re-roll GN to 326666 and fix GN-related bugs.

tools/mb/mb.py

 #!/usr/bin/env python
 # 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.
 
 """MB - the Meta-Build wrapper around GYP and GN
 
 MB is a wrapper script for GYP and GN that can be used to generate build files
 for sets of canned configurations and analyze them.
 """
@@ skipping 412 matching lines @@
     if 'gn_all' in inp['targets'] or 'all' in inp['targets']:
       self.WriteJSON({'status': 'Found dependency (all)'}, output_path)
       return 0
 
     all_needed_targets = set()
     ret = 0
     for f in inp['files']:
       cmd = self.GNCmd('refs', self.args.path[0]) + [
              '//' + f, '--type=executable', '--all', '--as=output']
       ret, out, _ = self.Run(cmd)
-      if ret:
+      if ret and not 'The input matches no targets' in out:
         self.WriteFailureAndRaise('gn refs returned %d: %s' % (ret, out),
                                   output_path)
 
       rpath = self.ToSrcRelPath(self.args.path[0]) + os.sep
       needed_targets = [t.replace(rpath, '') for t in out.splitlines()]
       needed_targets = [nt for nt in needed_targets if nt in inp['targets']]
       all_needed_targets.update(set(needed_targets))
 
     if all_needed_targets:
       # TODO: it could be that a target X might depend on a target Y
@@ skipping 104 matching lines @@
 
 if __name__ == '__main__':
   try:
     sys.exit(main(sys.argv[1:]))
   except MBErr as e:
     print(e)
     sys.exit(1)
   except KeyboardInterrupt:
     print("interrupted, exiting", stream=sys.stderr)
     sys.exit(130)