Adds support for remaining generic method syntax constructs.

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

Index: pkg/compiler/lib/src/parser/node_listener.dart
diff --git a/pkg/compiler/lib/src/parser/node_listener.dart b/pkg/compiler/lib/src/parser/node_listener.dart
index df288b6edb6be3c3a532baa01158e24efa171ace..cd9db993d9942131abcb1c4472354f9840c3d80e 100644
--- a/pkg/compiler/lib/src/parser/node_listener.dart
+++ b/pkg/compiler/lib/src/parser/node_listener.dart
@@ -566,6 +566,7 @@ class NodeListener extends ElementListener {
 
   void handleFunctionTypedFormalParameter(Token endToken) {
     NodeList formals = popNode();
+    popNode(); // typeVariables
     Identifier name = popNode();
     TypeAnnotation returnType = popNode();
     pushNode(null); // Signal "no type" to endFormalParameter.
@@ -755,6 +756,7 @@ class NodeListener extends ElementListener {
     Statement body = popNode();
     AsyncModifier asyncModifier = popNode();
     NodeList formals = popNode();
+    popNode(); // typeVariables
     pushNode(new FunctionExpression(
         null, formals, body, null, Modifiers.EMPTY, null, null, asyncModifier));
   }