Setup a peer for read only strings that are not externalized in

runtime/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/builtin.h"
 #include "bin/file.h"
 
 #include "platform/assert.h"
@@ skipping 180 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;
+  intptr_t char_size;
+  intptr_t str_len;
   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));
+    EXPECT_VALID(Dart_StringGetProperties(external_string,
+                                          &char_size,
+                                          &str_len,
+                                          &external_peer));
+    EXPECT_EQ(1, char_size);
+    EXPECT_EQ(4, str_len);
     EXPECT_EQ(&external_peer_data, external_peer);
   }
 
   Dart_ExitScope();
   timer.Stop();
   int64_t elapsed_time = timer.TotalElapsedTime();
   benchmark->set_score(elapsed_time);
 }
 
 
@@ skipping 237 matching lines @@
 
   Timer timer(true, "currentMirrorSystem() benchmark");
   timer.Start();
   Dart_Invoke(lib, NewString("benchmark"), 0, NULL);
   timer.Stop();
   int64_t elapsed_time = timer.TotalElapsedTime();
   benchmark->set_score(elapsed_time);
 }
 
 }  // namespace dart