dart2dart fix synthesized constructor appearing in unparser. Don't output it.

dart2dart fix synthesized constructor appearing in unparser. Don't output it.
For example, if we have:
class A {
}
main() {
  new A();
}

that would result in:
class A{class}...

that "class" is the unparse result of synthesized constructor.

Committed: https://code.google.com/p/dart/source/detail?r=9541

[Anton Muhin, 2012-07-10 13:27:46]

lgtm

https://chromiumcodereview.appspot.com/10735030/diff/1/tests/compiler/dart2js...
File tests/compiler/dart2js/unparser_test.dart (right):

https://chromiumcodereview.appspot.com/10735030/diff/1/tests/compiler/dart2js...
tests/compiler/dart2js/unparser_test.dart:137: testDart2Dart(src, (String s) =>
Expect.equals(src, s));
definitely the time to introduce a helper which checks the string doesn't change
after dart2dart.

[Anton Muhin, 2012-07-10 13:28:09]

Another option to consider: maybe add a flag to compiler not to synthesize
constructors.

[Roman, 2012-07-10 13:47:10]

On 2012/07/10 13:28:09, antonmuhin wrote:
> Another option to consider: maybe add a flag to compiler not to synthesize
> constructors.

Sounds like an overkill :) At least for now. We'll consider it if we encounter
more synthesized things we have to deal with.

[Roman, 2012-07-10 13:47:16]

https://chromiumcodereview.appspot.com/10735030/diff/1/tests/compiler/dart2js...
File tests/compiler/dart2js/unparser_test.dart (right):

https://chromiumcodereview.appspot.com/10735030/diff/1/tests/compiler/dart2js...
tests/compiler/dart2js/unparser_test.dart:137: testDart2Dart(src, (String s) =>
Expect.equals(src, s));
On 2012/07/10 13:27:46, antonmuhin wrote:
> definitely the time to introduce a helper which checks the string doesn't
change
> after dart2dart.

Done. If no continuation is passed to testDart2Dart() it will just check that
source does not change.