Treat generic method parameters as dynamic in all contexts in the VM (fixes #27460)

tests/language/language.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 [ ($compiler == none || $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit) ]
 tearoff_constructor_basic_test: Skip # Crashes in checked mode -- hausner investigating
+generic_methods_type_expression_test: RuntimeError # Issue 25869
 
 # These tests are skipped in the VM because it has "--supermixin"
 # functionality enabled unconditionally.  The tests should be removed
 # once the same is true for analyzer (#24478) and dart2js (#23773)
 mixin_illegal_super_use_test: Skip # Issues 24478 and 23773
 mixin_illegal_superclass_test: Skip # Issues 24478 and 23773
 
 # These bugs refer currently ongoing language discussions.
 constructor5_test: Fail # Issue 6422
 constructor6_test: Fail # Issue 6422
@@ skipping 18 matching lines @@
 # Non-contractive types are not supported in the vm.
 cyclic_type_test/02: Fail, OK
 cyclic_type_test/04: Fail, OK
 cyclic_type2_test: Fail, OK
 least_upper_bound_expansive_test/*: Fail, OK
 
 async_star_regression_2238_test: CompileTimeError, RuntimeError # drt only runtime-errs.
 async_star_cancel_while_paused_test: RuntimeError
 
 [ ($compiler == none || $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit) && $checked ]
-# The generic functions tests fail in checked mode because the parsed type parameters
-# are ignored.
-generic_methods_function_type_test: RuntimeError # Issue 25869
-generic_methods_test: RuntimeError # Issue 25869
-generic_methods_new_test: RuntimeError # Issue 25869
-generic_local_functions_test: RuntimeError # Issue 25869
-generic_functions_test: RuntimeError # Issue 25869
-generic_methods_generic_function_parameter_test: RuntimeError # Issue 25869
+# These generic functions tests pass for the wrong reason in checked mode,
+# because the parsed type parameters are mapped to dynamic type.
+generic_methods_function_type_test: Pass # Issue 25869
+generic_methods_test: Pass # Issue 25869
+generic_methods_new_test: Pass # Issue 25869
+generic_local_functions_test: Pass # Issue 25869
+generic_functions_test: Pass # Issue 25869
+generic_methods_generic_function_parameter_test: Pass # Issue 25869
 
 [ ($compiler == none || $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit) && ($runtime == vm || $runtime == dart_precompiled || $runtime == dart_app) ]
 
 class_keyword_test/02: MissingCompileTimeError # Issue 13627
 unicode_bom_test: Fail # Issue 16067
 vm/debug_break_enabled_vm_test/01: Crash, OK # Expected to hit breakpoint.
 try_catch_optimized1_test: Skip # Srdjan investigating
 
 [ ($compiler == none || $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit) && $checked ]
 type_variable_bounds4_test/01: Fail # Issue 14006
@@ skipping 218 matching lines @@
 assert_initializer_test: SKIP  # not implemented yet, experiment is VM only.
 
 [$runtime == vm && $compiler == none && $unchecked]
 assert_initializer_test/*: MissingCompileTimeError, OK  # asserts shouldn't fail in unchecked mode.
 assert_initializer_test/none: pass
 
 [$runtime == vm && $compiler == none && $checked]
 # The VM doesn't enforce that potentially const expressions are actually
 # const expressions when the constructor is called with `const`.
 assert_initializer_test/4*: MissingCompileTimeError # Issue 392.