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

src/compiler/common-operator.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/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
@@ skipping 557 matching lines @@
   return new (zone()) Operator1<double, base::bit_equal_to<double>,
                                 base::bit_hash<double>>(  // --
       IrOpcode::kNumberConstant, Operator::kPure,         // opcode
       "NumberConstant",                                   // name
       0, 0, 0, 1, 0, 0,                                   // counts
       value);                                             // parameter
 }
 
 
 const Operator* CommonOperatorBuilder::HeapConstant(
-    const Unique<HeapObject>& value) {
-  return new (zone()) Operator1<Unique<HeapObject>>(  // --
-      IrOpcode::kHeapConstant, Operator::kPure,       // opcode
-      "HeapConstant",                                 // name
-      0, 0, 0, 1, 0, 0,                               // counts
-      value);                                         // parameter
+    const Handle<HeapObject>& value) {
+  return new (zone())
+      Operator1<Handle<HeapObject>, Handle<HeapObject>::equal_to,
+                Handle<HeapObject>::hash>(           // --
+          IrOpcode::kHeapConstant, Operator::kPure,  // opcode
+          "HeapConstant",                            // name
+          0, 0, 0, 1, 0, 0,                          // counts
+          value);                                    // parameter
 }
 
 
 const Operator* CommonOperatorBuilder::Select(MachineType type,
                                               BranchHint hint) {
   return new (zone()) Operator1<SelectParameters>(  // --
       IrOpcode::kSelect, Operator::kPure,           // opcode
       "Select",                                     // name
       3, 0, 0, 1, 0, 0,                             // counts
       SelectParameters(type, hint));                // parameter
@@ skipping 185 matching lines @@
     Handle<SharedFunctionInfo> shared_info,
     ContextCallingMode context_calling_mode) {
   return new (zone()->New(sizeof(FrameStateFunctionInfo)))
       FrameStateFunctionInfo(type, parameter_count, local_count, shared_info,
                              context_calling_mode);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8