[turbofan] Move SimplifiedOperatorBuilder into JSGraph.

test/cctest/compiler/test-changes-lowering.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 <limits>
 
 #include "src/compiler/change-lowering.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-properties.h"
@@ skipping 16 matching lines @@
 using namespace v8::internal;
 using namespace v8::internal::compiler;
 
 template <typename ReturnType>
 class ChangesLoweringTester : public GraphBuilderTester<ReturnType> {
  public:
   explicit ChangesLoweringTester(MachineType p0 = kMachNone)
       : GraphBuilderTester<ReturnType>(p0),
         javascript(this->zone()),
         jsgraph(this->isolate(), this->graph(), this->common(), &javascript,
-                this->machine()),
+                nullptr, this->machine()),
         function(Handle<JSFunction>::null()) {}
 
   JSOperatorBuilder javascript;
   JSGraph jsgraph;
   Handle<JSFunction> function;
 
   Node* start() { return this->graph()->start(); }
 
   template <typename T>
   T* CallWithPotentialGC() {
@@ skipping 228 matching lines @@
     Object* true_obj = t.heap()->true_value();
     CHECK_EQ(true_obj, result);
   }
 
   {
     Object* result = t.Call(0);
     Object* false_obj = t.heap()->false_value();
     CHECK_EQ(false_obj, result);
   }
 }