Fixes a couple problems with GC of unoptimized code.

runtime/vm/object.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 "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 4085 matching lines @@
 
 
 void Function::SetCode(const Code& value) const {
   StorePointer(&raw_ptr()->code_, value.raw());
   ASSERT(Function::Handle(value.function()).IsNull() ||
     (value.function() == this->raw()));
   value.set_function(*this);
 }
 
 
-void Function::DetachCode() const {
-  // Set unoptimized code as non-entrant, and set code and unoptimized code
-  // to null.
-  CodePatcher::PatchEntry(Code::Handle(unoptimized_code()));
-  StorePointer(&raw_ptr()->code_, Code::null());
-  StorePointer(&raw_ptr()->unoptimized_code_, Code::null());
-}
-
-
-void Function::ReattachCode(const Code& code) const {
-  StorePointer(&raw_ptr()->code_, code.raw());
-  StorePointer(&raw_ptr()->unoptimized_code_, code.raw());
-  CodePatcher::RestoreEntry(code);
-}
-
-
 void Function::SwitchToUnoptimizedCode() const {
   ASSERT(HasOptimizedCode());
 
   const Code& current_code = Code::Handle(CurrentCode());
 
   // Optimized code object might have been actually fully produced by the
   // intrinsifier in this case nothing has to be done. In fact an attempt to
   // patch such code will cause crash.
   // TODO(vegorov): if intrisifier can fully intrinsify the function then we
   // should not later try to optimize it.
@@ skipping 11873 matching lines @@
   return "_MirrorReference";
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   Instance::PrintToJSONStream(stream, ref);
 }
 
 
 }  // namespace dart