- Fix the type test failure for implicit native closures.

vm/code_generator_ia32.cc

Index: vm/code_generator_ia32.cc
===================================================================
--- vm/code_generator_ia32.cc	(revision 8816)
+++ vm/code_generator_ia32.cc	(working copy)
@@ -423,8 +423,9 @@
       __ Bind(&argc_in_range);
     }
   } else {
+    int implicit_this_param_pos = is_instance_native_closure ? -1 : 0;
     ASSERT(parsed_function_.first_parameter_index() ==
-           ParsedFunction::kFirstLocalSlotIndex);
+           (ParsedFunction::kFirstLocalSlotIndex + implicit_this_param_pos));
     // Copy positional arguments.
     // Check that no fewer than num_fixed_params positional arguments are passed
     // in and that no more than num_params arguments are passed in.
@@ -451,7 +452,6 @@
     __ leal(EBX, Address(EBP, EBX, TIMES_2, 2 * kWordSize));
     // Let EDI point to the last copied positional argument, i.e. to
     // fp[ParsedFunction::kFirstLocalSlotIndex - (num_pos_args - 1)].
-    int implicit_this_param_pos = is_instance_native_closure ? -1 : 0;
     const int index =
         ParsedFunction::kFirstLocalSlotIndex + 1 + implicit_this_param_pos;
     // First copy captured receiver if function is an implicit native closure.