Add current rss and embedder name to Observatory

runtime/observatory/lib/src/models/objects/vm.dart

Index: runtime/observatory/lib/src/models/objects/vm.dart
diff --git a/runtime/observatory/lib/src/models/objects/vm.dart b/runtime/observatory/lib/src/models/objects/vm.dart
index f1f50885943e406fe82fa71a6b5fb5465e36e42b..21b8abd22b09b474b9b3b8266cb5b85ff85ee246 100644
--- a/runtime/observatory/lib/src/models/objects/vm.dart
+++ b/runtime/observatory/lib/src/models/objects/vm.dart
@@ -30,6 +30,8 @@ abstract class VM implements VMRef, ServiceObjectOwner {
   /// The Dart VM version string.
   String get version;
 
+  String get embedder;
+
   /// The amount of memory currently allocated by native code in zones.
   int get nativeZoneMemoryUsage;
 
@@ -43,6 +45,7 @@ abstract class VM implements VMRef, ServiceObjectOwner {
   int get heapAllocationCount;
 
   int get maxRSS;
+  int get currentRSS;
 
   /// The time that the VM started in milliseconds since the epoch.
   ///