Do not embed is_auto_setup_scope into the compilation of native calls.

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 RUNTIME_VM_INTERMEDIATE_LANGUAGE_H_
 #define RUNTIME_VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 3380 matching lines @@
         token_pos_(node->token_pos()) {}
 
   NativeCallInstr(const String* name,
                   const Function* function,
                   bool link_lazily,
                   TokenPosition position)
       : native_name_(name),
         function_(function),
         native_c_function_(NULL),
         is_bootstrap_native_(false),
+        is_auto_scope_(true),
         link_lazily_(link_lazily),
         token_pos_(position) {}
 
   DECLARE_INSTRUCTION(NativeCall)
 
   const String& native_name() const { return *native_name_; }
   const Function& function() const { return *function_; }
   NativeFunction native_c_function() const { return native_c_function_; }
   bool is_bootstrap_native() const { return is_bootstrap_native_; }
+  bool is_auto_scope() const { return is_auto_scope_; }
   bool link_lazily() const { return link_lazily_; }
   virtual TokenPosition token_pos() const { return token_pos_; }
 
   virtual bool ComputeCanDeoptimize() const { return false; }
 
   virtual EffectSet Effects() const { return EffectSet::All(); }
 
   void SetupNative();
 
   PRINT_OPERANDS_TO_SUPPORT
 
  private:
   void set_native_c_function(NativeFunction value) {
     native_c_function_ = value;
   }
 
   void set_is_bootstrap_native(bool value) { is_bootstrap_native_ = value; }
+  void set_is_auto_scope(bool value) { is_auto_scope_ = value; }
 
   const String* native_name_;
   const Function* function_;
   NativeFunction native_c_function_;
   bool is_bootstrap_native_;
+  bool is_auto_scope_;
   bool link_lazily_;
   const TokenPosition token_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeCallInstr);
 };
 
 
 class DebugStepCheckInstr : public TemplateInstruction<0, NoThrow> {
  public:
   DebugStepCheckInstr(TokenPosition token_pos, RawPcDescriptors::Kind stub_kind)
@@ skipping 4597 matching lines @@
   LocationSummary* Name::MakeLocationSummary(Zone* zone, bool opt) const {     \
     UNIMPLEMENTED();                                                           \
     return NULL;                                                               \
   }                                                                            \
   void Name::EmitNativeCode(FlowGraphCompiler* compiler) { UNIMPLEMENTED(); }
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_INTERMEDIATE_LANGUAGE_H_