ClosureArgumentMismatchException is not defined

[efortuna]

Consider the following Dart code:

import('dart:html');

void main() {
  window.setTimeout(() => (new Bar()).foo(), 100);
}
class Bar {
  foo() {
    print('Hello world');
  }
}

The following JavaScript is generated:
function $throwArgMismatch() {
    // TODO(jmesserly): better error message
    $throw(new ClosureArgumentMismatchException());
}

Except "ClosureArgumentMismatchException" is not defined anywhere in the file. Resulting in "Uncaught ReferenceError: ClosureArgumentMismatchException is not defined"

[jmesserly]

Yeah... the compiler doesn't know that $genStub depends ClosureArgumentMismatchException.
On an unrelated note, we probably want our own subtype of this so we can actually provide an error message. The one in corelib is not so nice...

class ClosureArgumentMismatchException implements Exception {
  const ClosureArgumentMismatchException();
  String toString() => "Closure argument mismatch";
}

[jmesserly]

Error message isn't great but hopefully more clear now:

Closure argument mismatch: Wrong number of arguments to function. Expected 0 positional arguments and at most 0 named arguments, but got 1 positional arguments and 0 named arguments.

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Added Fixed label.