Introduce dartanalyze into our build.

mojo/tools/mojob.py

Index: mojo/tools/mojob.py
diff --git a/mojo/tools/mojob.py b/mojo/tools/mojob.py
index fb9e1441ea52ef93b67b792814fc9d62b3e2caec..7f60900656af4c6251c0fde73c841b9bdae25b0c 100755
--- a/mojo/tools/mojob.py
+++ b/mojo/tools/mojob.py
@@ -112,6 +112,14 @@ def build(config):
     return subprocess.call(['ninja', '-C', out_dir])
 
 
+def dartcheck(config):
+  """Runs the dart analyzer on code for the given config."""
+
+  out_dir = _get_out_dir(config)
+  print 'Checking dart code in %s ...' % out_dir
+  return subprocess.call(['ninja', '-C', out_dir, 'dartcheck'])
+
+
 def _run_tests(config, test_types):
   """Runs the tests of the given type(s) for the given config."""
 
@@ -244,6 +252,10 @@ def main():
       help='Run NaCl unit tests (does not build).')
   nacltest_parser.set_defaults(func=nacltest)
 
+  dartcheck_parser = subparsers.add_parser('dartcheck', parents=[parent_parser],
+      help='Run the dart source code analyzer to check for warnings.')
+  dartcheck_parser.set_defaults(func=dartcheck)
+
   args = parser.parse_args()
   config = _args_to_config(args)
   return args.func(config)