[turbofan] Remove locally constructed simplified builders.

test/unittests/compiler/js-typed-lowering-unittest.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/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 62 matching lines @@
 
 
 class JSTypedLoweringTest : public TypedGraphTest {
  public:
   JSTypedLoweringTest() : TypedGraphTest(3), javascript_(zone()) {}
   ~JSTypedLoweringTest() override {}
 
  protected:
   Reduction Reduce(Node* node) {
     MachineOperatorBuilder machine(zone());
-    JSGraph jsgraph(isolate(), graph(), common(), javascript(), nullptr,
+    SimplifiedOperatorBuilder simplified(zone());
+    JSGraph jsgraph(isolate(), graph(), common(), javascript(), &simplified,
                     &machine);
     // TODO(titzer): mock the GraphReducer here for better unit testing.
     GraphReducer graph_reducer(zone(), graph());
     JSTypedLowering reducer(&graph_reducer, &jsgraph, zone());
     return reducer.Reduce(node);
   }
 
   Handle<JSArrayBuffer> NewArrayBuffer(void* bytes, size_t byte_length) {
     Handle<JSArrayBuffer> buffer = factory()->NewJSArrayBuffer();
     JSArrayBuffer::Setup(buffer, isolate(), true, bytes, byte_length);
@@ skipping 1013 matching lines @@
   EXPECT_THAT(r.replacement(),
               IsFinishRegion(IsAllocate(IsNumberConstant(Context::SizeFor(
                                             Context::MIN_CONTEXT_SLOTS)),
                                         IsBeginRegion(effect), control),
                              _));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8