Don't return private fields from imported libs

runtime/vm/debugger.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_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/object.h"
@@ skipping 303 matching lines @@
 
   bool IsDebuggable(const Function& func);
 
   intptr_t nextId() { return next_id_++; }
 
   bool ShouldPauseOnException(DebuggerStackTrace* stack_trace,
                               const Object& exc);
 
   void CollectLibraryFields(const GrowableObjectArray& field_list,
                             const Library& lib,
-                            const String& prefix);
+                            const String& prefix,
+                            bool include_private_fields);
 
   Isolate* isolate_;
   bool initialized_;
   BreakpointHandler* bp_handler_;
   EventHandler* event_handler_;
 
   // ID number generator.
   intptr_t next_id_;
 
   // Current stack trace. Valid while executing breakpoint callback code.
@@ skipping 19 matching lines @@
   intptr_t exc_pause_info_;
 
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_