Changes to pass the current isolate to all runtime and native calls.

runtime/vm/heap.cc

 // Copyright (c) 2011, 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 "vm/assert.h"
 #include "vm/compiler_stats.h"
 #include "vm/flags.h"
 #include "vm/isolate.h"
@@ skipping 119 matching lines @@
   return reinterpret_cast<uword>(new_space_->TopAddress());
 }
 
 
 uword Heap::EndAddress() {
   return reinterpret_cast<uword>(new_space_->EndAddress());
 }
 
 
 #if defined(DEBUG)
-NoGCScope::NoGCScope() : StackResource(), isolate_(Isolate::Current()) {
-  isolate_->IncrementNoGCScopeDepth();
+NoGCScope::NoGCScope() : StackResource(Isolate::Current()) {
+  isolate()->IncrementNoGCScopeDepth();
 }
 
 
 NoGCScope::~NoGCScope() {
-  isolate_->DecrementNoGCScopeDepth();
+  isolate()->DecrementNoGCScopeDepth();
 }
 #endif  // defined(DEBUG)
 
 }  // namespace dart