Observatory:

runtime/observatory/lib/src/elements/native_memory_profiler.dart

Index: runtime/observatory/lib/src/elements/native_memory_profiler.dart
diff --git a/runtime/observatory/lib/src/elements/native_memory_profiler.dart b/runtime/observatory/lib/src/elements/native_memory_profiler.dart
index 2820afe90ab423032a7a402ad86d67a8c3394bcf..a2ea1bc4570306372b4894c7edf7f77730856f99 100644
--- a/runtime/observatory/lib/src/elements/native_memory_profiler.dart
+++ b/runtime/observatory/lib/src/elements/native_memory_profiler.dart
@@ -52,7 +52,7 @@ class NativeMemoryProfileElement extends HtmlElement implements Renderable {
   M.NotificationRepository get notifications => _notifications;
   M.NativeMemorySampleProfileRepository get profiles => _profiles;
   // With non-isolate version.
-  M.VMRef get vm => _vm;
+  M.VM get vm => _vm;

[devoncarew, 2017/06/01 21:12:20]

Is this overriding something, or providing access to code outside this library?
The getter's now ~the same as the _vm field.

(from a quick pass, it looks like neither; consider just removing the getter)

[rmacnak, 2017/06/01 21:25:56]

I don't see other users, so removed. We can always add it back later if needed.

 
   factory NativeMemoryProfileElement(
       M.VM vm,
@@ -143,8 +143,8 @@ class NativeMemoryProfileElement extends HtmlElement implements Renderable {
   }
 
   Future _request({bool forceFetch: false}) async {
-    for (Isolate isolate in vm.isolates) {
-      await isolate.invokeRpc("_collectAllGarbage", {});
+    for (M.Isolate isolate in vm.isolates) {
+      await isolate.collectAllGarbage();
     }
     _progress = null;
     _progressStream = _profiles.get(_vm, _tag, forceFetch: forceFetch);