Add NoSafepointScope to ObjectPointerVisitor.

runtime/vm/heap.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/heap.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/flags.h"
 #include "vm/isolate.h"
@@ skipping 753 matching lines @@
     MicrosecondsToMilliseconds(stats_.times_[1]),
     MicrosecondsToMilliseconds(stats_.times_[2]),
     MicrosecondsToMilliseconds(stats_.times_[3]),
     stats_.data_[0],
     stats_.data_[1],
     stats_.data_[2],
     stats_.data_[3]);
 }
 
 
-#if defined(DEBUG)
-NoSafepointScope::NoSafepointScope() : StackResource(Thread::Current()) {
-  thread()->IncrementNoSafepointScopeDepth();
-}
-
-
-NoSafepointScope::~NoSafepointScope() {
-  thread()->DecrementNoSafepointScopeDepth();
-}
-#endif  // defined(DEBUG)
-
-
 NoHeapGrowthControlScope::NoHeapGrowthControlScope()
     : StackResource(Isolate::Current()) {
     Heap* heap = reinterpret_cast<Isolate*>(isolate())->heap();
     current_growth_controller_state_ = heap->GrowthControlState();
     heap->DisableGrowthControl();
 }
 
 
 NoHeapGrowthControlScope::~NoHeapGrowthControlScope() {
     Heap* heap = reinterpret_cast<Isolate*>(isolate())->heap();
     heap->SetGrowthControlState(current_growth_controller_state_);
 }
 
 }  // namespace dart