Unify most of our utf8 implementations. This takes the implementation

runtime/bin/main.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 <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
@@ skipping 259 matching lines @@
   }
   if (is_dart_scheme_url) {
     ASSERT(tag == kImportTag);
     // Handle imports of other built-in libraries present in the SDK.
     if (DartUtils::IsDartIOLibURL(url_string)) {
       return Builtin::LoadLibrary(Builtin::kIOLibrary);
     } else if (DartUtils::IsDartJsonLibURL(url_string)) {
       return Builtin::LoadLibrary(Builtin::kJsonLibrary);
     } else if (DartUtils::IsDartUriLibURL(url_string)) {
       return Builtin::LoadLibrary(Builtin::kUriLibrary);
-    } else if (DartUtils::IsDartUtf8LibURL(url_string)) {
-      return Builtin::LoadLibrary(Builtin::kUtf8Library);
+    } else if (DartUtils::IsDartUtfLibURL(url_string)) {
+      return Builtin::LoadLibrary(Builtin::kUtfLibrary);
     } else {
       return Dart_Error("Do not know how to load '%s'", url_string);
     }
   } else if (is_dart_extension_url) {
     if (tag != kImportTag) {
       return Dart_Error("Dart extensions must use import: '%s'", url_string);
     }
     return Extensions::LoadExtension(url_string, library);
   }
   result = DartUtils::LoadSource(NULL,
@@ skipping 332 matching lines @@
   DumpPprofSymbolInfo();
   // Shutdown the isolate.
   Dart_ShutdownIsolate();
   // Terminate event handler.
   EventHandler::Terminate();
   // Terminate process exit-code handler.
   Process::TerminateExitCodeHandler();
 
   return 0;
 }