Auto create ApiLocalScope before calling native functions, this ensures that

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/dart_entry.h"
@@ skipping 1050 matching lines @@
   // Pass a pointer to the first argument in RAX.
   if (!function().HasOptionalParameters()) {
     __ leaq(RAX, Address(RBP, (kParamEndSlotFromFp +
                                function().NumParameters()) * kWordSize));
   } else {
     __ leaq(RAX,
             Address(RBP, kFirstLocalSlotFromFp * kWordSize));
   }
   __ movq(RBX, Immediate(reinterpret_cast<uword>(native_c_function())));
   __ movq(R10, Immediate(NativeArguments::ComputeArgcTag(function())));
+  const ExternalLabel* stub_entry =
+      (is_bootstrap_native()) ? &StubCode::CallBootstrapCFunctionLabel() :
+                                &StubCode::CallNativeCFunctionLabel();
   compiler->GenerateCall(token_pos(),
-                         &StubCode::CallNativeCFunctionLabel(),
+                         stub_entry,
                          PcDescriptors::kOther,
                          locs());
   __ popq(result);
 }
 
 
 static bool CanBeImmediateIndex(Value* index, intptr_t cid) {
   if (!index->definition()->IsConstant()) return false;
   const Object& constant = index->definition()->AsConstant()->value();
   if (!constant.IsSmi()) return false;
@@ skipping 3498 matching lines @@
                          PcDescriptors::kOther,
                          locs());
   __ Drop(2);  // Discard type arguments and receiver.
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64