Kill service_test.cc tests in favor of dart tests for the service protocol.

runtime/observatory/tests/service/get_heap_map_rpc_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=--compile-all --error_on_bad_type --error_on_bad_override
+
+import 'dart:async';
+
+import 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+
+import 'test_helper.dart';
+
+var tests = [
+  (Isolate isolate) async {
+    var params = {
+    };
+    var result = await isolate.invokeRpcNoUpgrade('getHeapMap', params);
+    expect(result['type'], equals('HeapMap'));
+    expect(result['freeClassId'], isPositive);
+    expect(result['unitSizeBytes'], isPositive);
+    expect(result['pageSizeBytes'], isPositive);
+    expect(result['classList'], isNotNull);
+    expect(result['pages'].length, isPositive);
+    expect(result['pages'][0]['objectStart'], new isInstanceOf<String>());
+    expect(result['pages'][0]['objects'].length, isPositive);
+    expect(result['pages'][0]['objects'][0], isPositive);
+  },
+];
+
+main(args) async => runIsolateTests(args, tests);