Fix StringBase_createFromCodePoints to correctly accept Latin-1 characters

vm/benchmark_test.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/benchmark_test.h"
 
 #include "bin/file.h"
 
 #include "platform/assert.h"
 
@@ skipping 185 matching lines @@
 //
 BENCHMARK(DartStringAccess) {
   const int kNumIterations = 10000000;
   Timer timer(true, "DartStringAccess benchmark");
   timer.Start();
   Dart_EnterScope();
 
   // Create strings.
   uint8_t data8[] = { 'o', 'n', 'e', 0xFF };
   int external_peer_data = 123;
-  Dart_Handle external_string = Dart_NewExternalUTF8String(data8,
-                                                           ARRAY_SIZE(data8),
-                                                           &external_peer_data,
-                                                           NULL);
+  Dart_Handle external_string = Dart_NewExternalLatin1String(
+      data8, ARRAY_SIZE(data8), &external_peer_data, NULL);
   Dart_Handle internal_string = NewString("two");
 
   // Run benchmark.
   for (int64_t i = 0; i < kNumIterations; i++) {
     EXPECT(Dart_IsString(internal_string));
     EXPECT(!Dart_IsExternalString(internal_string));
     EXPECT_VALID(external_string);
     EXPECT(Dart_IsExternalString(external_string));
     void* external_peer = NULL;
     EXPECT_VALID(Dart_ExternalStringGetPeer(external_string, &external_peer));
@@ skipping 164 matching lines @@
   Dart_Handle cls = Dart_GetClass(lib, NewString("StackFrameTest"));
   Dart_Handle result = Dart_Invoke(cls, NewString("testMain"), 0, NULL);
   EXPECT_VALID(result);
   int64_t elapsed_time = 0;
   result = Dart_IntegerToInt64(result, &elapsed_time);
   EXPECT_VALID(result);
   benchmark->set_score(elapsed_time);
 }
 
 }  // namespace dart