Revert OneByteString back to ISO Latin-1 instead of ASCII

runtime/vm/dart_api_impl.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 "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 1498 matching lines @@
 
 
 // --- Strings ---
 
 
 DART_EXPORT bool Dart_IsString(Dart_Handle object) {
   return RawObject::IsStringClassId(Api::ClassId(object));
 }
 
 
-DART_EXPORT bool Dart_IsAsciiString(Dart_Handle object) {
+DART_EXPORT bool Dart_IsStringLatin1(Dart_Handle object) {
   return RawObject::IsOneByteStringClassId(Api::ClassId(object));
 }
 
 
 DART_EXPORT Dart_Handle Dart_StringLength(Dart_Handle str, intptr_t* len) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   const String& str_obj = Api::UnwrapStringHandle(isolate, str);
   if (str_obj.IsNull()) {
     RETURN_TYPE_ERROR(isolate, str, String);
@@ skipping 2960 matching lines @@
   }
   {
     NoGCScope no_gc;
     RawObject* raw_obj = obj.raw();
     isolate->heap()->SetPeer(raw_obj, peer);
   }
   return Api::Success(isolate);
 }
 
 }  // namespace dart