Adds support for --generic-method-syntax

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

Index: pkg/compiler/lib/src/parser/element_listener.dart
diff --git a/pkg/compiler/lib/src/parser/element_listener.dart b/pkg/compiler/lib/src/parser/element_listener.dart
index fa524cc9365050aadfef18bc3f1d7c0d29b143ec..f05268b5e2285b2293133f97bf84ab801a3b313f 100644
--- a/pkg/compiler/lib/src/parser/element_listener.dart
+++ b/pkg/compiler/lib/src/parser/element_listener.dart
@@ -327,6 +327,7 @@ class ElementListener extends Listener {
   void endTopLevelMethod(Token beginToken, Token getOrSet, Token endToken) {
     bool hasParseError = currentMemberHasParseError;
     memberErrors = memberErrors.tail;
+    popNode(); // typeVariables
     Identifier name = popNode();
     popNode(); // type
     Modifiers modifiers = popNode();
@@ -398,7 +399,7 @@ class ElementListener extends Listener {
     pushNode(makeNodeList(count, beginToken, endToken, ','));
   }
 
-  void handleNoTypeVariables(token) {
+  void handleNoTypeVariables(Token token) {
     pushNode(null);
   }