Revert "Add current rss and embedder name to Observatory"

runtime/vm/metrics.cc

 // Copyright (c) 2014, 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.
 
 #if !defined(PRODUCT)
 
 #include "vm/metrics.h"
 
 #include "vm/isolate.h"
 #include "vm/json_stream.h"
@@ skipping 271 matching lines @@
 int64_t MetricHeapUsed::Value() const {
   ASSERT(isolate() == Isolate::Current());
   return isolate()->heap()->UsedInWords(Heap::kNew) * kWordSize +
          isolate()->heap()->UsedInWords(Heap::kOld) * kWordSize;
 }
 
 int64_t MetricIsolateCount::Value() const {
   return Isolate::IsolateListLength();
 }
 
-int64_t MetricCurrentRSS::Value() const {
-  return Service::CurrentRSS();
-}
-
 int64_t MetricPeakRSS::Value() const {
-  return Service::MaxRSS();
+  return OS::MaxRSS();
 }
 
 #define VM_METRIC_VARIABLE(type, variable, name, unit)                         \
   static type vm_metric_##variable##_;
 VM_METRIC_LIST(VM_METRIC_VARIABLE);
 #undef VM_METRIC_VARIABLE
 
 void Metric::InitOnce() {
 #define VM_METRIC_INIT(type, variable, name, unit)                             \
   vm_metric_##variable##_.Init(name, NULL, Metric::unit);
@@ skipping 31 matching lines @@
 
 void MinMetric::SetValue(int64_t new_value) {
   if (new_value < value()) {
     set_value(new_value);
   }
 }
 
 }  // namespace dart
 
 #endif  // !defined(PRODUCT)