Remove support for generating visualizer format file for the flowgraph.

runtime/vm/dart_api_impl.cc

 // 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.
 
 #include "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 4435 matching lines @@
     *buffer_size = 0;
   }
 }
 
 
 DART_EXPORT void Dart_InitPerfEventsSupport(Dart_FileWriterFunction function) {
   Dart::set_perf_events_writer(function);
 }
 
 
-DART_EXPORT void Dart_InitFlowGraphPrinting(Dart_FileWriterFunction function) {
-  Dart::set_flow_graph_writer(function);
-}
-
-
 // --- Peer support ---
 
 
 DART_EXPORT Dart_Handle Dart_GetPeer(Dart_Handle object, void** peer) {
   if (peer == NULL) {
     RETURN_NULL_ERROR(peer);
   }
   Isolate* isolate = Isolate::Current();
   const Object& obj = Object::Handle(isolate, Api::UnwrapHandle(object));
   if (obj.IsNull() || obj.IsNumber() || obj.IsBool()) {
@@ skipping 20 matching lines @@
   }
   {
     NoGCScope no_gc;
     RawObject* raw_obj = obj.raw();
     isolate->heap()->SetPeer(raw_obj, peer);
   }
   return Api::Success(isolate);
 }
 
 }  // namespace dart