Do not embed is_auto_setup_scope into the compilation of native calls.

runtime/vm/intermediate_language_x64.cc

 // 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.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/compiler.h"
@@ skipping 794 matching lines @@
   if (!function().HasOptionalParameters()) {
     __ leaq(RAX,
             Address(RBP, (kParamEndSlotFromFp + function().NumParameters()) *
                              kWordSize));
   } else {
     __ leaq(RAX, Address(RBP, kFirstLocalSlotFromFp * kWordSize));
   }
   __ LoadImmediate(R10, Immediate(argc_tag));
   const StubEntry* stub_entry;
   if (link_lazily()) {
-    stub_entry = StubCode::CallBootstrapCFunction_entry();
+    stub_entry = StubCode::CallBootstrapNative_entry();
     ExternalLabel label(NativeEntry::LinkNativeCallEntry());
     __ LoadNativeEntry(RBX, &label, kPatchable);
     compiler->GeneratePatchableCall(token_pos(), *stub_entry,
                                     RawPcDescriptors::kOther, locs());
   } else {
-    stub_entry = (is_bootstrap_native())
-                     ? StubCode::CallBootstrapCFunction_entry()
-                     : StubCode::CallNativeCFunction_entry();
+    if (is_bootstrap_native()) {
+      stub_entry = StubCode::CallBootstrapNative_entry();
+    } else if (is_auto_scope()) {
+      stub_entry = StubCode::CallAutoScopeNative_entry();
+    } else {
+      stub_entry = StubCode::CallNoScopeNative_entry();
+    }
     const ExternalLabel label(reinterpret_cast<uword>(native_c_function()));
     __ LoadNativeEntry(RBX, &label, kNotPatchable);
     compiler->GenerateCall(token_pos(), *stub_entry, RawPcDescriptors::kOther,
                            locs());
   }
   __ popq(result);
 }
 
 
 static bool CanBeImmediateIndex(Value* index, intptr_t cid) {
@@ skipping 5947 matching lines @@
   __ Drop(1);
   __ popq(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64