Remove fields from Isolate in Product mode

runtime/vm/dart.cc

 // Copyright (c) 2013, 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.
 
 #include "vm/dart.h"
 
 #include "vm/become.h"
 #include "vm/clustered_snapshot.h"
 #include "vm/code_observers.h"
 #include "vm/cpu.h"
@@ skipping 137 matching lines @@
   PortMap::InitOnce();
   FreeListElement::InitOnce();
   ForwardingCorpse::InitOnce();
   Api::InitOnce();
   NOT_IN_PRODUCT(CodeObservers::InitOnce());
   if (FLAG_profiler) {
     ThreadInterrupter::InitOnce();
     Profiler::InitOnce();
   }
   SemiSpace::InitOnce();
-  Metric::InitOnce();
+  NOT_IN_PRODUCT(Metric::InitOnce());
   StoreBuffer::InitOnce();
   MarkingStack::InitOnce();
 
 #if defined(USING_SIMULATOR)
   Simulator::InitOnce();
 #endif
   // Create the read-only handles area.
   ASSERT(predefined_handles_ == NULL);
   predefined_handles_ = new ReadOnlyHandles();
   // Create the VM isolate and finish the VM initialization.
@@ skipping 196 matching lines @@
 
   {
     // Set the VM isolate as current isolate when shutting down
     // Metrics so that we can use a StackZone.
     if (FLAG_trace_shutdown) {
       OS::PrintErr("[+%" Pd64 "ms] SHUTDOWN: Entering vm isolate\n",
                    UptimeMillis());
     }
     bool result = Thread::EnterIsolate(vm_isolate_);
     ASSERT(result);
-    Metric::Cleanup();
+    NOT_IN_PRODUCT(Metric::Cleanup());
     Thread::ExitIsolate();
   }
 
   // Disable the creation of new isolates.
   if (FLAG_trace_shutdown) {
     OS::PrintErr("[+%" Pd64 "ms] SHUTDOWN: Disabling isolate creation\n",
                  UptimeMillis());
   }
   Isolate::DisableIsolateCreation();
 
@@ skipping 363 matching lines @@
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 bool Dart::IsReadOnlyApiHandle(Dart_Handle handle) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->api_handles_.IsValidHandle(handle);
 }
 
 }  // namespace dart