Remove more things

runtime/vm/code_observers.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_CODE_OBSERVERS_H_
 #define VM_CODE_OBSERVERS_H_
 
 #include "vm/globals.h"
 #include "vm/allocation.h"
 
 namespace dart {
 
 class Mutex;

[siva, 2016/02/18 23:34:03]

This could move under #ifndef PRODUCT too?

[Cutch, 2016/02/22 16:05:44]

Done.

 
+#ifndef PRODUCT
+
 // Object observing code creation events. Used by external profilers and
 // debuggers to map address ranges to function names.
 class CodeObserver {
  public:
   CodeObserver() { }
 
   virtual ~CodeObserver() { }
 
   // Returns true if this observer is active and should be notified
   // about newly created code objects.
@@ skipping 33 matching lines @@
   static Mutex* mutex() {
     return mutex_;
   }
 
  private:
   static Mutex* mutex_;
   static intptr_t observers_length_;
   static CodeObserver** observers_;
 };
 
+#endif  // !PRODUCT
 
 }  // namespace dart
 
 #endif  // VM_CODE_OBSERVERS_H_