Make CTX allocatable by the register allocator.

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/invocation_mirror.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
 #include "vm/exceptions.h"
@@ skipping 1342 matching lines @@
   // runtime type of null is the Null type, which we correctly return here.
   return type.Canonicalize();
 }
 
 
 DEFINE_NATIVE_ENTRY(ClosureMirror_function, 1) {
   GET_NON_NULL_NATIVE_ARGUMENT(Instance, closure, arguments->NativeArgAt(0));
   ASSERT(!closure.IsNull());
 
   Function& function = Function::Handle();
-  bool callable = closure.IsCallable(&function, NULL);
+  bool callable = closure.IsCallable(&function);
   if (callable) {
     return CreateMethodMirror(function, Instance::null_instance());
   }
   return Instance::null();
 }
 
 
 DEFINE_NATIVE_ENTRY(ClassMirror_invoke, 5) {
   // Argument 0 is the mirror, which is unused by the native. It exists
   // because this native is an instance method in order to be polymorphic
@@ skipping 588 matching lines @@
 }
 
 DEFINE_NATIVE_ENTRY(TypeMirror_moreSpecificTest, 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.IsMoreSpecificThan(b, NULL)).raw();
 }
 
 
 }  // namespace dart