Add support for generic function type syntax, part 1

pkg/dev_compiler/lib/src/compiler/code_generator.dart

Index: pkg/dev_compiler/lib/src/compiler/code_generator.dart
diff --git a/pkg/dev_compiler/lib/src/compiler/code_generator.dart b/pkg/dev_compiler/lib/src/compiler/code_generator.dart
index 46ddce3a113ef5075e19c3fb9df4dd2221d2b645..47e27c63b66178ed3bd20577e8de079b5180229d 100644
--- a/pkg/dev_compiler/lib/src/compiler/code_generator.dart
+++ b/pkg/dev_compiler/lib/src/compiler/code_generator.dart
@@ -3614,7 +3614,15 @@ class CodeGenerator extends GeneralizingAstVisitor
     } else if (typeArgs != null) {
       // Dynamic calls may have type arguments, even though the function types
       // are not known.
-      return typeArgs.arguments.map(visitTypeName).toList(growable: false);
+      return typeArgs.arguments.map((argument) {
+        if (argument is TypeName) {
+          return visitTypeName(argument);
+        } else {
+          // TODO(brianwilkerson) Implement support for GenericFunctionType.
+          throw new StateError(
+              'Cannot compile type argument of kind ${argument.runtimeType}');
+        }
+      }).toList(growable: false);
     }
     return null;
   }