[turbofan] Remove usage of Unique<T> from graph.

test/unittests/compiler/change-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-stubs.h"
 #include "src/compiler/change-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 27 matching lines @@
     JSOperatorBuilder javascript(zone());
     JSGraph jsgraph(isolate(), graph(), common(), &javascript, &machine);
     ChangeLowering reducer(&jsgraph);
     return reducer.Reduce(node);
   }
 
   SimplifiedOperatorBuilder* simplified() { return &simplified_; }
 
   Matcher<Node*> IsAllocateHeapNumber(const Matcher<Node*>& effect_matcher,
                                       const Matcher<Node*>& control_matcher) {
-    return IsCall(_, IsHeapConstant(Unique<HeapObject>::CreateImmovable(
-                         AllocateHeapNumberStub(isolate()).GetCode())),
-                  IsNumberConstant(BitEq(0.0)), effect_matcher,
-                  control_matcher);
+    return IsCall(
+        _, IsHeapConstant(AllocateHeapNumberStub(isolate()).GetCode()),
+        IsNumberConstant(BitEq(0.0)), effect_matcher, control_matcher);
   }
   Matcher<Node*> IsChangeInt32ToSmi(const Matcher<Node*>& value_matcher) {
     return Is64() ? IsWord64Shl(IsChangeInt32ToInt64(value_matcher),
                                 IsSmiShiftBitsConstant())
                   : IsWord32Shl(value_matcher, IsSmiShiftBitsConstant());
   }
   Matcher<Node*> IsChangeSmiToInt32(const Matcher<Node*>& value_matcher) {
     return Is64() ? IsTruncateInt64ToInt32(
                         IsWord64Sar(value_matcher, IsSmiShiftBitsConstant()))
                   : IsWord32Sar(value_matcher, IsSmiShiftBitsConstant());
@@ skipping 394 matching lines @@
                       CaptureEq(&branch),
                       IsBranch(IsUint32LessThanOrEqual(
                                    value, IsInt32Constant(Smi::kMaxValue)),
                                graph()->start()))),
                   AllOf(CaptureEq(&if_false), IsIfFalse(CaptureEq(&branch))))));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8