Remove Dart_AddGcPrologueCallback and Dart_RemoveGcPrologueCallback from the Dart API.

runtime/include/dart_api.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 INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
@@ skipping 538 matching lines @@
  * A callback invoked at the beginning of a garbage collection.
  */
 typedef void (*Dart_GcPrologueCallback)();
 
 /**
  * A callback invoked at the end of a garbage collection.
  */
 typedef void (*Dart_GcEpilogueCallback)();
 
 /**
- * Adds a garbage collection prologue callback.
- *
- * \param callback A function pointer to a prologue callback function.
- *   This function must not have been previously added as a prologue
- *   callback.
- *
- * \return Success if the callback was added.  Otherwise, returns an
- *   error handle.
- */
-DART_EXPORT Dart_Handle Dart_AddGcPrologueCallback(
-    Dart_GcPrologueCallback callback);
-
-/**
- * Removes a garbage collection prologue callback.
- *
- * \param callback A function pointer to a prologue callback function.
- *   This function must have been added as a prologue callback.
- *
- * \return Success if the callback was removed.  Otherwise, returns an
- *   error handle.
- */
-DART_EXPORT Dart_Handle Dart_RemoveGcPrologueCallback(
-    Dart_GcPrologueCallback callback);
-
-/**
- * Adds a garbage collection epilogue callback.
- *
- * \param callback A function pointer to an epilogue callback
- *   function.  This function must not have been previously added as
- *   an epilogue callback.
- *
- * \return Success if the callback was added.  Otherwise, returns an
- *   error handle.
- */
-DART_EXPORT Dart_Handle Dart_AddGcEpilogueCallback(
-    Dart_GcEpilogueCallback callback);
-
-/**
- * Removes a garbage collection epilogue callback.
- *
- * \param callback A function pointer to an epilogue callback
- *   function.  This function must have been added as an epilogue
- *   callback.
- *
- * \return Success if the callback was removed.  Otherwise, returns an
- *   error handle.
- */
-DART_EXPORT Dart_Handle Dart_RemoveGcEpilogueCallback(
-    Dart_GcEpilogueCallback callback);
-
-/**
  * Adds garbage collection callbacks (prologue and epilogue).
  *
  * \param prologue_callback A function pointer to a prologue callback function.
  *   A prologue callback function should not be already set when this function
  *   is called. A NULL value removes the existing prologue callback function
  *   if any.
  *
  * \param epilogue_callback A function pointer to an epilogue callback function.
  *   An epilogue callback function should not be already set when this function
  *   is called. A NULL value removes the existing epilogue callback function
@@ skipping 1950 matching lines @@
  * NOTE: If multiple callbacks with the same name are registered, only the
  * last callback registered will be remembered.
  */
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data);
 
 
 #endif  /* INCLUDE_DART_API_H_ */  /* NOLINT */