Allow the native resolver to setup whether it needs the Dart API scope to

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
===================================================================
--- runtime/vm/dart_api_impl.cc	(revision 31283)
+++ runtime/vm/dart_api_impl.cc	(working copy)
@@ -1172,7 +1172,7 @@
 
 DART_EXPORT Dart_Handle Dart_Null() {
   Isolate* isolate = Isolate::Current();
-  CHECK_ISOLATE_SCOPE(isolate);
+  CHECK_ISOLATE(isolate);
   return Api::Null();
 }
 
@@ -1551,21 +1551,21 @@
 
 DART_EXPORT Dart_Handle Dart_True() {
   Isolate* isolate = Isolate::Current();
-  CHECK_ISOLATE_SCOPE(isolate);
+  CHECK_ISOLATE(isolate);
   return Api::True();
 }
 
 
 DART_EXPORT Dart_Handle Dart_False() {
   Isolate* isolate = Isolate::Current();
-  CHECK_ISOLATE_SCOPE(isolate);
+  CHECK_ISOLATE(isolate);
   return Api::False();
 }
 
 
 DART_EXPORT Dart_Handle Dart_NewBoolean(bool value) {
   Isolate* isolate = Isolate::Current();
-  CHECK_ISOLATE_SCOPE(isolate);
+  CHECK_ISOLATE(isolate);
   return value ? Api::True() : Api::False();
 }