Added ability to request zone memory information for all isolates through the VM service and added …

runtime/observatory/tests/service/get_zone_memory_info_rpc_test.dart

Index: runtime/observatory/tests/service/get_zone_memory_info_rpc_test.dart
diff --git a/runtime/observatory/tests/service/get_zone_memory_info_rpc_test.dart b/runtime/observatory/tests/service/get_zone_memory_info_rpc_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..4e9faed8929e4af5f8b214b316e865dd273643b1
--- /dev/null
+++ b/runtime/observatory/tests/service/get_zone_memory_info_rpc_test.dart
@@ -0,0 +1,41 @@
+// Copyright (c) 2016, 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
+
+import 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+
+import 'test_helper.dart';
+
+var tests = [
+  (VM vm) async {
+    isInstanceOf<int> isInt = new isInstanceOf<int>();
+    // Just iterate over all the isolates to confirm they have
+    // the correct fields needed to examine zone memory usage.
+    for (Isolate isolate in vm.isolates) {
+      await isolate.reload();
+      var params = {

[Cutch, 2016/12/16 22:55:44]

why is this here? It's not being used.

[bkonyi, 2016/12/16 22:59:58]

Forgot to remove this... whoops.

+        "isolateId" : isolate.id
+      };
+      expect(isolate.threads, isNotNull);
+      print(isolate);
+      var threads = isolate.threads;

[Cutch, 2016/12/16 22:55:44]

use strong mode types here and elsewhere

[bkonyi, 2016/12/16 22:59:58]

Acknowledged.

+
+      for (var thread in threads) {

[Cutch, 2016/12/16 22:55:44]

use strong mode types here and elsewhere.

[bkonyi, 2016/12/16 22:59:58]

Acknowledged.

+        expect(thread.type, equals('_Thread'));
+        expect(thread.id, isNotNull);
+        expect(thread.kind, isNotNull);
+        expect(thread.zones, isNotNull);
+        var zones = thread.zones;
+
+        for (var zone in zones) {
+          expect(zone.capacity, isInt);
+          expect(zone.used, isInt);
+        }
+      }
+    }
+  },
+];
+
+main(args) async => runVMTests(args, tests);