Unify most of our utf8 implementations. This takes the implementation

runtime/bin/builtin.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 <stdio.h>
 
 #include "include/dart_api.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
@@ skipping 15 matching lines @@
       break;
     case kIOLibrary:
       source = Dart_NewString(Builtin::io_source_);
       break;
     case kJsonLibrary:
       source = Dart_NewString(Builtin::json_source_);
       break;
     case kUriLibrary:
       source = Dart_NewString(Builtin::uri_source_);
       break;
-    case kUtf8Library:
-      source = Dart_NewString(Builtin::utf8_source_);
+    case kUtfLibrary:
+      source = Dart_NewString(Builtin::utf_source_);
       break;
     default:
       return Dart_Error("Unknown builtin source requested.");
   }
   return source;
 }
 
 
 void Builtin::SetupLibrary(Dart_Handle library, BuiltinLibraryId id) {
-  if ((id == kJsonLibrary) || (id == kUriLibrary) || (id == kUtf8Library)) {
+  if ((id == kJsonLibrary) || (id == kUriLibrary) || (id == kUtfLibrary)) {
     // No native resolver for these pure Dart libraries.
     return;
   } else if (id == kBuiltinLibrary) {
     // Import the builtin library into the core and isolate libraries.
     ImportBuiltinLibIntoLib(DartUtils::kCoreLibURL, library);
     ImportBuiltinLibIntoLib(DartUtils::kCoreImplLibURL, library);
     ImportBuiltinLibIntoLib(DartUtils::kIsolateLibURL, library);
   }
   // Setup the native resolver for built in library functions.
   DART_CHECK_VALID(Dart_SetNativeResolver(library, NativeLookup));
 }
 
 
 Dart_Handle Builtin::LoadLibrary(BuiltinLibraryId id) {
   Dart_Handle url;
   switch (id) {
     case kBuiltinLibrary:
       url = Dart_NewString(DartUtils::kBuiltinLibURL);
       break;
     case kIOLibrary:
       url = Dart_NewString(DartUtils::kIOLibURL);
       break;
     case kJsonLibrary:
       url = Dart_NewString(DartUtils::kJsonLibURL);
       break;
     case kUriLibrary:
       url = Dart_NewString(DartUtils::kUriLibURL);
       break;
-    case kUtf8Library:
-      url = Dart_NewString(DartUtils::kUtf8LibURL);
+    case kUtfLibrary:
+      url = Dart_NewString(DartUtils::kUtfLibURL);
       break;
     default:
       return Dart_Error("Unknown builtin library requested.");
   }
   Dart_Handle library = Dart_LookupLibrary(url);
   if (Dart_IsError(library)) {
     Dart_Handle import_map = Dart_NewList(0);
     library = Dart_LoadLibrary(url, Source(id), import_map);
     if (!Dart_IsError(library)) {
       SetupLibrary(library, id);
     }
   }
   DART_CHECK_VALID(library);
   return library;
 }
 
 
 void Builtin::ImportLibrary(Dart_Handle library, BuiltinLibraryId id) {
   Dart_Handle imported_library = LoadLibrary(id);
   // Import the library into current library.
   DART_CHECK_VALID(Dart_LibraryImportLibrary(library, imported_library));
 }