Use getSourceReport for coverage/callsites in Observatory.

runtime/observatory/tests/service/caching_test.dart

 // Copyright (c) 2015, 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.
 // VMOptions=--error_on_bad_type --error_on_bad_override
 
 // If caching is working properly, the coverage data will go into the same
 // Script object from which we requested coverage data, instead of a new
 // Script object.
 
 library caching_test;
 
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 
-script() {
-  print("This executed");
-}
-
-hasSomeCoverageData(Script script) {
-  for (var line in script.lines) {
-    if (line.hits != null) return true;
-  }
-  return false;
-}
-
 var tests = [
 (Isolate isolate) async {
   Library lib = await isolate.rootLibrary.load();
   Script script = await lib.scripts.single.load();
-  expect(hasSomeCoverageData(script), isFalse);
-  Script script2 = await script.refreshCoverage();
+  Script script2 = await isolate.getObject(script.id);
   expect(identical(script, script2), isTrue);
-  expect(hasSomeCoverageData(script), isTrue);
 },
 
 ];
 
-main(args) => runIsolateTests(args, tests, testeeBefore: script);
+main(args) => runIsolateTests(args, tests);