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

src/compiler/interpreter-assembler.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 "src/compiler/interpreter-assembler.h"
 
 #include <ostream>
 
 #include "src/compiler/graph.h"
 #include "src/compiler/instruction-selector.h"
@@ skipping 151 matching lines @@
 Node* InterpreterAssembler::IntPtrConstant(intptr_t value) {
   return raw_assembler_->IntPtrConstant(value);
 }
 
 
 Node* InterpreterAssembler::NumberConstant(double value) {
   return raw_assembler_->NumberConstant(value);
 }
 
 
-Node* InterpreterAssembler::HeapConstant(Unique<HeapObject> object) {
+Node* InterpreterAssembler::HeapConstant(Handle<HeapObject> object) {
   return raw_assembler_->HeapConstant(object);
 }
 
 
 Node* InterpreterAssembler::SmiShiftBitsConstant() {
   return Int32Constant(kSmiShiftSize + kSmiTagSize);
 }
 
 
 Node* InterpreterAssembler::SmiTag(Node* value) {
@@ skipping 51 matching lines @@
 
 
 Node* InterpreterAssembler::CallJSBuiltin(int context_index, Node* receiver,
                                           Node* arg1) {
   return CallJSBuiltin(context_index, receiver, &arg1, 1);
 }
 
 
 void InterpreterAssembler::Return() {
   Node* exit_trampoline_code_object =
-      HeapConstant(Unique<HeapObject>::CreateImmovable(
-          isolate()->builtins()->InterpreterExitTrampoline()));
+      HeapConstant(isolate()->builtins()->InterpreterExitTrampoline());
   // If the order of the parameters you need to change the call signature below.
   STATIC_ASSERT(0 == Linkage::kInterpreterAccumulatorParameter);
   STATIC_ASSERT(1 == Linkage::kInterpreterRegisterFileParameter);
   STATIC_ASSERT(2 == Linkage::kInterpreterBytecodeOffsetParameter);
   STATIC_ASSERT(3 == Linkage::kInterpreterBytecodeArrayParameter);
   STATIC_ASSERT(4 == Linkage::kInterpreterDispatchTableParameter);
   STATIC_ASSERT(5 == Linkage::kInterpreterContextParameter);
   Node* args[] = { GetAccumulator(),
                    RegisterFileRawPointer(),
                    BytecodeOffset(),
@@ skipping 74 matching lines @@
   return raw_assembler_->schedule();
 }
 
 
 Zone* InterpreterAssembler::zone() { return raw_assembler_->zone(); }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8