Add some support for the code-point code-unit distinction.

runtime/vm/parser.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/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 1360 matching lines @@
   Library& coreimpl = Library::Handle(Library::CoreImplLibrary());
   return coreimpl.LookupClassAllowPrivate(class_name);
 }
 
 
 // Lookup class in the core lib which also contains various VM
 // helper methods and classes. Allow look up of private classes.
 static RawClass* LookupCoreClass(const String& class_name) {
   const Library& core_lib = Library::Handle(Library::CoreLibrary());
   String& name = String::Handle(class_name.raw());
-  if (class_name.CharAt(0) == Scanner::kPrivateIdentifierStart) {
+  if (class_name.CodeUnitAt(0) == Scanner::kPrivateIdentifierStart) {
     // Private identifiers are mangled on a per script basis.
     name = String::Concat(name, String::Handle(core_lib.private_key()));
     name = Symbols::New(name);
   }
   return core_lib.LookupClass(name);
 }
 
 
 StaticCallNode* Parser::BuildInvocationMirrorAllocation(
     intptr_t call_pos,
@@ skipping 8559 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart