Auto create ApiLocalScope before calling native functions, this ensures that

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 3260 matching lines @@
   const Function& function() const { return ast_node_.function(); }
 
   const String& native_name() const {
     return ast_node_.native_c_function_name();
   }
 
   NativeFunction native_c_function() const {
     return ast_node_.native_c_function();
   }
 
+  bool is_bootstrap_native() const {
+    return ast_node_.is_bootstrap_native();
+  }
+
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual EffectSet Effects() const { return EffectSet::All(); }
 
   virtual bool MayThrow() const {
     UNREACHABLE();
     return true;
   }
@@ skipping 3340 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_