Handle 'dynamic' as type argument in generic calls.

tests/compiler/dart2js/generic_method_type_usage_test.dart

Index: tests/compiler/dart2js/generic_method_type_usage_test.dart
diff --git a/tests/compiler/dart2js/generic_method_type_usage_test.dart b/tests/compiler/dart2js/generic_method_type_usage_test.dart
index b1f0f222262d2cd91bf6b83bc3d3b9ca910f4040..bbaae7824d22d1809b4e3225f97603ec9fd6a04c 100644
--- a/tests/compiler/dart2js/generic_method_type_usage_test.dart
+++ b/tests/compiler/dart2js/generic_method_type_usage_test.dart
@@ -69,6 +69,13 @@ main() {
   aFunction<Set>();
 }
 ''',
+
+  'dynamic_as_type_argument.dart': '''
+main() {
+  method<dynamic>();
+}
+method<T>() {}
+''',
 };
 
 Future runTest(Uri main, {MessageKind warning, MessageKind info}) async {
@@ -84,7 +91,7 @@ Future runTest(Uri main, {MessageKind warning, MessageKind info}) async {
       outputProvider: output);
 
   Expect.isFalse(output.hasExtraOutput);
-  Expect.equals(0, diagnostics.errors.length);
+  Expect.equals(0, diagnostics.errors.length, "Unexpected errors.");
   Expect.equals(warning != null ? 1 : 0, diagnostics.warnings.length);
   if (warning != null) {
     Expect.equals(warning, diagnostics.warnings.first.message.kind);
@@ -105,5 +112,7 @@ void main() {
 
     await runTest(Uri.parse('memory:cannot_new_function_type_variable.dart'),
         warning: MessageKind.CANNOT_INSTANTIATE_TYPE_VARIABLE);
+
+    await runTest(Uri.parse('memory:dynamic_as_type_argument.dart'));
   });
 }