Fix building of parameter descriptors from Kernel

runtime/lib/mirrors.cc

 // 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.
 
 #include "lib/mirrors.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
@@ skipping 127 matching lines @@
     has_extra_parameter_info = false;
   }
 
   Array& param_descriptor = Array::Handle();
   if (has_extra_parameter_info) {
     // Reparse the function for the following information:
     // * The default value of a parameter.
     // * Whether a parameters has been declared as final.
     // * Any metadata associated with the parameter.
     Object& result = Object::Handle();
-
-    kernel::TreeNode* kernel_node =
-        reinterpret_cast<kernel::TreeNode*>(func.kernel_function());
-    if (kernel_node != NULL) {
-      result = kernel::BuildParameterDescriptor(kernel_node);
+    if (func.kernel_function() != NULL) {
+      result = kernel::BuildParameterDescriptor(func);
     } else {
       result = Parser::ParseFunctionParameters(func);
     }
     if (result.IsError()) {
       Exceptions::PropagateError(Error::Cast(result));
       UNREACHABLE();
     }
     param_descriptor ^= result.raw();
     ASSERT(param_descriptor.Length() ==
            (Parser::kParameterEntrySize * non_implicit_param_count));
@@ skipping 1938 matching lines @@
 
 DEFINE_NATIVE_ENTRY(TypeMirror_subtypeTest, 2) {
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, a, arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, b, arguments->NativeArgAt(1));
   return Bool::Get(a.IsSubtypeOf(b, NULL, NULL, Heap::kNew)).raw();
 }
 
 #endif  // !PRODUCT && !DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart