Use symbols when looking up fields in a class

runtime/lib/mirrors.cc

 // Copyright (c) 2012, 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 "lib/mirrors.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
@@ skipping 699 matching lines @@
   // a special null instance. This is different from a field being null. Callers
   // make sure that this null does not leak into Dartland.
   return Object::sentinel().raw();
 }
 
 
 static RawInstance* InvokeClassGetter(const Class& klass,
                                       const String& getter_name,
                                       const bool throw_nsm_if_absent) {
   // Note static fields do not have implicit getters.
-  const Field& field = Field::Handle(klass.LookupStaticField(getter_name));
+  const Field& field =
+      Field::Handle(klass.LookupStaticFieldAllowPrivate(getter_name));
   if (field.IsNull() || field.IsUninitialized()) {
     const String& internal_getter_name = String::Handle(
         Field::GetterName(getter_name));
     Function& getter = Function::Handle(
         klass.LookupStaticFunction(internal_getter_name));
 
     if (getter.IsNull() || !getter.is_reflectable()) {
       if (getter.IsNull()) {
         getter = klass.LookupStaticFunction(getter_name);
         if (!getter.IsNull()) {
@@ skipping 831 matching lines @@
   GET_NON_NULL_NATIVE_ARGUMENT(String, setter_name, arguments->NativeArgAt(2));
   GET_NATIVE_ARGUMENT(Instance, value, arguments->NativeArgAt(3));
 
   const Error& error = Error::Handle(zone, klass.EnsureIsFinalized(thread));
   if (!error.IsNull()) {
     Exceptions::PropagateError(error);
     UNREACHABLE();
   }
 
   // Check for real fields and user-defined setters.
-  const Field& field = Field::Handle(klass.LookupStaticField(setter_name));
+  const Field& field =
+      Field::Handle(klass.LookupStaticFieldAllowPrivate(setter_name));
   Function& setter = Function::Handle();
   const String& internal_setter_name = String::Handle(
       Field::SetterName(setter_name));
 
   if (field.IsNull()) {
     setter = klass.LookupStaticFunction(internal_setter_name);
 
     const int kNumArgs = 1;
     const Array& args = Array::Handle(Array::New(kNumArgs));
     args.SetAt(0, value);
@@ skipping 521 matching lines @@
 
 DEFINE_NATIVE_ENTRY(TypeMirror_subtypeTest, 2) {
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, a, arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, b, arguments->NativeArgAt(1));
   return Bool::Get(a.IsSubtypeOf(b, NULL, NULL, Heap::kNew)).raw();
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart