[tubofan] Remove .dot output of --trace-turbo

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 982 matching lines @@
 };
 
 
 struct PrintGraphPhase {
   static const char* phase_name() { return nullptr; }
 
   void Run(PipelineData* data, Zone* temp_zone, const char* phase) {
     CompilationInfo* info = data->info();
     Graph* graph = data->graph();
 
-    {  // Print dot.
-      FILE* dot_file = OpenVisualizerLogFile(info, phase, "dot", "w+");
-      if (dot_file == nullptr) return;
-      OFStream dot_of(dot_file);
-      dot_of << AsDOT(*graph);
-      fclose(dot_file);
-    }
-
     {  // Print JSON.
       FILE* json_file = OpenVisualizerLogFile(info, NULL, "json", "a+");
       if (json_file == nullptr) return;
       OFStream json_of(json_file);
       json_of << "{\"name\":\"" << phase << "\",\"type\":\"graph\",\"data\":"
               << AsJSON(*graph, data->source_positions()) << "},\n";
       fclose(json_file);
     }
 
     if (FLAG_trace_turbo_graph) {  // Simple textual RPO.
@@ skipping 459 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8