Report all swarming and isolate fatal errors in a consistent way.

isolate.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Front end tool to operate on .isolate files.
 
 This includes creating, merging or compiling them to generate a .isolated file.
 
 See more information at
@@ skipping 2431 matching lines @@
       # there.
       options.outdir = os.path.normpath(os.path.join(cwd, options.outdir))
 
     return options, args
 
 
 def main(argv):
   dispatcher = subcommand.CommandDispatcher(__name__)
   try:
     return dispatcher.execute(OptionParserIsolate(version=__version__), argv)
-  except (
-      ExecutionError,
-      isolateserver.ConfigError,
-      isolateserver.MappingError) as e:
-    sys.stderr.write('\nError: ')
-    sys.stderr.write(str(e))
-    sys.stderr.write('\n')
+  except Exception as e:
+    tools.report_error(e)
     return 1
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   tools.disable_buffering()
   colorama.init()
   sys.exit(main(sys.argv[1:]))