[turbofan] Minor cleanup for JSGenericLowering.

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"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/operator-properties.h"
 #include "src/unique.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 JSGenericLowering::JSGenericLowering(bool is_typing_enabled, JSGraph* jsgraph)
     : is_typing_enabled_(is_typing_enabled), jsgraph_(jsgraph) {}
 
 
+JSGenericLowering::~JSGenericLowering() {}
+
+
 Reduction JSGenericLowering::Reduce(Node* node) {
   switch (node->opcode()) {
 #define DECLARE_CASE(x)  \
     case IrOpcode::k##x: \
       Lower##x(node);    \
       break;
     JS_OP_LIST(DECLARE_CASE)
 #undef DECLARE_CASE
     case IrOpcode::kBranch:
       // TODO(mstarzinger): If typing is enabled then simplified lowering will
@@ skipping 474 matching lines @@
   Node* ephi = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, merge);
 
   // Relax controls of {node}, i.e. make it free floating.
   NodeProperties::ReplaceWithValue(node, node, ephi, merge);
   NodeProperties::ReplaceEffectInput(ephi, efalse, 1);
 
   // Turn the stack check into a runtime call.
   ReplaceWithRuntimeCall(node, Runtime::kStackGuard);
 }
 
+
+Zone* JSGenericLowering::zone() const { return graph()->zone(); }
+
+
+Isolate* JSGenericLowering::isolate() const { return jsgraph()->isolate(); }
+
+
+Graph* JSGenericLowering::graph() const { return jsgraph()->graph(); }
+
+
+CommonOperatorBuilder* JSGenericLowering::common() const {
+  return jsgraph()->common();
+}
+
+
+MachineOperatorBuilder* JSGenericLowering::machine() const {
+  return jsgraph()->machine();
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8