Fixes in dart2js parser to be able to parse files without the diet-parser

pkg/compiler/lib/src/parser/partial_parser.dart

Index: pkg/compiler/lib/src/parser/partial_parser.dart
diff --git a/pkg/compiler/lib/src/parser/partial_parser.dart b/pkg/compiler/lib/src/parser/partial_parser.dart
index 08682653737f5213927eda0d759e5fe309cc15b6..3e2c0259d73e62b58af3d6fcfc005a5a95cd4622 100644
--- a/pkg/compiler/lib/src/parser/partial_parser.dart
+++ b/pkg/compiler/lib/src/parser/partial_parser.dart
@@ -26,6 +26,7 @@ class PartialParser extends Parser {
     // This method is overridden for two reasons:
     // 1. Avoid generating events for arguments.
     // 2. Avoid calling skip expression for each argument (which doesn't work).
+    listener.handleNoArguments(token);

[Siggi Cherem (dart-lang), 2016/09/30 22:28:07]

note: listeners now assume that metadata is always parsed, without this we had
an inconsistent state where the arguments of an annotation where missing.

question: in reason #1 above: was "generating events" meant calling listeners
like I do here? Should we remove that reason now?

     if (optional('(', token)) {
       BeginGroupToken begin = token;
       return begin.endGroup.next;