Remove GC prologue and epilogue callbacks.

runtime/vm/isolate.h

 // 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.
 
 #ifndef RUNTIME_VM_ISOLATE_H_
 #define RUNTIME_VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/atomic.h"
@@ skipping 366 matching lines @@
   bool ErrorsFatal() const { return ErrorsFatalBit::decode(isolate_flags_); }
   void SetErrorsFatal(bool val) {
     isolate_flags_ = ErrorsFatalBit::update(val, isolate_flags_);
   }
 
   Random* random() { return &random_; }
 
   Simulator* simulator() const { return simulator_; }
   void set_simulator(Simulator* value) { simulator_ = value; }
 
-  Dart_GcPrologueCallback gc_prologue_callback() const {
-    return gc_prologue_callback_;
-  }
-
-  void set_gc_prologue_callback(Dart_GcPrologueCallback callback) {
-    gc_prologue_callback_ = callback;
-  }
-
-  Dart_GcEpilogueCallback gc_epilogue_callback() const {
-    return gc_epilogue_callback_;
-  }
-
-  void set_gc_epilogue_callback(Dart_GcEpilogueCallback callback) {
-    gc_epilogue_callback_ = callback;
-  }
-
   Monitor* spawn_count_monitor() const { return spawn_count_monitor_; }
   intptr_t* spawn_count() { return &spawn_count_; }
 
   void IncrementSpawnCount();
   void WaitForOutstandingSpawns();
 
   static void SetCreateCallback(Dart_IsolateCreateCallback cb) {
     create_callback_ = cb;
   }
   static Dart_IsolateCreateCallback CreateCallback() {
@@ skipping 515 matching lines @@
   ApiState* api_state_;
   Random random_;
   Simulator* simulator_;
   Mutex* mutex_;          // Protects compiler stats.
   Mutex* symbols_mutex_;  // Protects concurrent access to the symbol table.
   Mutex* type_canonicalization_mutex_;      // Protects type canonicalization.
   Mutex* constant_canonicalization_mutex_;  // Protects const canonicalization.
   Mutex* megamorphic_lookup_mutex_;  // Protects megamorphic table lookup.
   MessageHandler* message_handler_;
   IsolateSpawnState* spawn_state_;
-  Dart_GcPrologueCallback gc_prologue_callback_;
-  Dart_GcEpilogueCallback gc_epilogue_callback_;
   intptr_t defer_finalization_count_;
   MallocGrowableArray<PendingLazyDeopt>* pending_deopts_;
   DeoptContext* deopt_context_;
 
   RawGrowableObjectArray* tag_table_;
 
   RawGrowableObjectArray* deoptimized_code_array_;
 
   RawError* sticky_error_;
 
@@ skipping 176 matching lines @@
   intptr_t* spawn_count_;
 
   Dart_IsolateFlags isolate_flags_;
   bool paused_;
   bool errors_are_fatal_;
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_ISOLATE_H_