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

src/compiler/js-generic-lowering.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/code-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 517 matching lines @@
 
 
 void JSGenericLowering::LowerJSCreateLiteralObject(Node* node) {
   int literal_flags = OpParameter<int>(node->op());
   node->InsertInput(zone(), 3, jsgraph()->SmiConstant(literal_flags));
   ReplaceWithRuntimeCall(node, Runtime::kCreateObjectLiteral);
 }
 
 
 void JSGenericLowering::LowerJSCreateCatchContext(Node* node) {
-  Unique<String> name = OpParameter<Unique<String>>(node);
+  Handle<String> name = OpParameter<Handle<String>>(node);
   node->InsertInput(zone(), 0, jsgraph()->HeapConstant(name));
   ReplaceWithRuntimeCall(node, Runtime::kPushCatchContext);
 }
 
 
 void JSGenericLowering::LowerJSCallConstruct(Node* node) {
   int arity = OpParameter<int>(node);
   CallConstructStub stub(isolate(), SUPER_CONSTRUCTOR_CALL);
   CallInterfaceDescriptor d = stub.GetCallInterfaceDescriptor();
   CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
@@ skipping 298 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8