Revert OneByteString back to ISO Latin-1 instead of ASCII

runtime/vm/symbols.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 "vm/symbols.h"
 
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/raw_object.h"
@@ skipping 84 matching lines @@
 RawString* Symbols::New(const char* str) {
   ASSERT(str != NULL);
   Utf8::Type type;
   intptr_t str_len = strlen(str);
   const uint8_t* utf8_array = reinterpret_cast<const uint8_t*>(str);
   intptr_t len = Utf8::CodePointCount(utf8_array, str_len, &type);
   Zone* zone = Isolate::Current()->current_zone();
   if (len == 0) {
     return Symbols::New(reinterpret_cast<uint8_t*>(NULL), 0);
   }
-  if (type == Utf8::kAscii) {
+  if (type == Utf8::kLatin1) {
     uint8_t* characters = zone->Alloc<uint8_t>(len);
-    Utf8::DecodeToAscii(utf8_array, str_len, characters, len);
+    Utf8::DecodeToLatin1(utf8_array, str_len, characters, len);
     return New(characters, len);
   }
   ASSERT((type == Utf8::kBMP) || (type == Utf8::kSMP));
   uint16_t* characters = zone->Alloc<uint16_t>(len);
   Utf8::DecodeToUTF16(utf8_array, str_len, characters, len);
   return New(characters, len);
 }
 
 
 template<typename T>
@@ skipping 193 matching lines @@
 }
 
 
 RawObject* Symbols::GetVMSymbol(intptr_t object_id) {
   ASSERT(IsVMSymbolId(object_id));
   intptr_t i = (object_id - kMaxPredefinedObjectIds);
   return (i > 0 && i < Symbols::kMaxId) ? predefined_[i] : Object::null();
 }
 
 }  // namespace dart