[turbofan] Move SimplifiedOperatorBuilder into JSGraph.

test/unittests/compiler/bytecode-graph-builder-unittest.cc

 // Copyright 2015 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 <iostream>
 
 #include "src/compiler/bytecode-graph-builder.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/instruction.h"
@@ skipping 33 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilderTest);
 };
 
 
 Graph* BytecodeGraphBuilderTest::GetCompletedGraph() {
   MachineOperatorBuilder* machine = new (zone()) MachineOperatorBuilder(
       zone(), kMachPtr, InstructionSelector::SupportedMachineOperatorFlags());
   CommonOperatorBuilder* common = new (zone()) CommonOperatorBuilder(zone());
   JSOperatorBuilder* javascript = new (zone()) JSOperatorBuilder(zone());
   Graph* graph = new (zone()) Graph(zone());
-  JSGraph* jsgraph =
-      new (zone()) JSGraph(isolate(), graph, common, javascript, machine);
+  JSGraph* jsgraph = new (zone())
+      JSGraph(isolate(), graph, common, javascript, nullptr, machine);
 
   Handle<String> name = factory()->NewStringFromStaticChars("test");
   Handle<String> script = factory()->NewStringFromStaticChars("test() {}");
   Handle<SharedFunctionInfo> shared_info =
       factory()->NewSharedFunctionInfo(name, MaybeHandle<Code>());
   shared_info->set_script(*factory()->NewScript(script));
 
   ParseInfo parse_info(zone(), shared_info);
   CompilationInfo info(&parse_info);
   Handle<BytecodeArray> bytecode_array = array_builder()->ToBytecodeArray();
@@ skipping 175 matching lines @@
   EXPECT_EQ(1, end->InputCount());
   Node* ret = end->InputAt(0);
   EXPECT_THAT(
       ret, IsReturn(IsJSAdd(IsNumberConstant(kLeft), IsNumberConstant(kRight)),
                     _, _));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8