Fix all dartanalyzer errors in dart:sky except the Native ones.

sky/tools/shelldb

 #!/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.
 
 from skypy.skyserver import SkyServer
 import argparse
 import json
 import logging
 import os
@@ skipping 185 matching lines @@
         analyze_parser.add_argument('app_path', type=str)
         analyze_parser.set_defaults(func=self.run)
 
     def run(self, args, pids):
         ANALYZER_PATH = 'third_party/dart-sdk/dart-sdk/bin/dartanalyzer'
 
         build_dir = os.path.abspath(pids['build_dir'])
         bindings_path = os.path.join(build_dir, 'gen/sky/bindings')
         sky_builtin_path = \
             os.path.join(SRC_ROOT, 'sky/engine/bindings/builtin.dart')
-        sky_core_path = os.path.join(bindings_path, 'sky_core.dart')
+        dart_sky_path = os.path.join(bindings_path, 'dart_sky.dart')
         mojo_bindings_path = \
             os.path.join(SRC_ROOT, 'mojo/public/dart/bindings.dart')
         mojo_core_path = os.path.join(SRC_ROOT, 'mojo/public/dart/core.dart')
         analyzer_args = [ANALYZER_PATH,
             # sky_core.dart does not compile cleanly yet. :(
-            # "--url-mapping=dart:sky,%s" % sky_core_path,
+            # "--url-mapping=dart:sky,%s" % dart_sky_path,
             "--url-mapping=dart:sky_builtin,%s" % sky_builtin_path,
             "--url-mapping=mojo:bindings,%s" % mojo_bindings_path,
             "--url-mapping=mojo:core,%s" % mojo_core_path,
             args.app_path
         ]
         subprocess.call(analyzer_args)
 
 
 class SkyShellRunner(object):
     def main(self):
         logging.basicConfig(level=logging.WARNING)
 
         parser = argparse.ArgumentParser(description='Sky Shell Runner')
         subparsers = parser.add_subparsers(help='sub-command help')
 
         for command in [StartSky(), StopSky(), Analyze()]:
             command.add_subparser(subparsers)
 
         args = parser.parse_args()
         pids = Pids.read_from(PID_FILE_PATH, PID_FILE_KEYS)
         exit_code = args.func(args, pids)
         # We could do this with an at-exit handler instead?
         pids.write_to(PID_FILE_PATH)
         sys.exit(exit_code)
 
 
 if __name__ == '__main__':
     SkyShellRunner().main()