Remove the dependency of Zone on Isolate

test/cctest/compiler/graph-builder-tester.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 "test/cctest/compiler/graph-builder-tester.h"
 
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
-MachineCallHelper::MachineCallHelper(Zone* zone, MachineSignature* machine_sig)
-    : CallHelper(zone->isolate(), machine_sig),
+MachineCallHelper::MachineCallHelper(Isolate* isolate,
+                                     MachineSignature* machine_sig)
+    : CallHelper(isolate, machine_sig),
       parameters_(NULL),
+      isolate_(isolate),
       graph_(NULL) {}
 
 
 void MachineCallHelper::InitParameters(GraphBuilder* builder,
                                        CommonOperatorBuilder* common) {
   DCHECK_EQ(NULL, parameters_);
   graph_ = builder->graph();
   int param_count = static_cast<int>(parameter_count());
   if (param_count == 0) return;
   parameters_ = graph_->zone()->NewArray<Node*>(param_count);
   for (int i = 0; i < param_count; ++i) {
     parameters_[i] = builder->NewNode(common->Parameter(i), graph_->start());
   }
 }
 
 
 byte* MachineCallHelper::Generate() {
   DCHECK(parameter_count() == 0 || parameters_ != NULL);
   if (!Pipeline::SupportedBackend()) return NULL;
   if (code_.is_null()) {
     Zone* zone = graph_->zone();
     CallDescriptor* desc =
         Linkage::GetSimplifiedCDescriptor(zone, machine_sig_);
-    code_ = Pipeline::GenerateCodeForTesting(desc, graph_);
+    code_ = Pipeline::GenerateCodeForTesting(isolate_, desc, graph_);
   }
   return code_.ToHandleChecked()->entry();
 }
 
 
 Node* MachineCallHelper::Parameter(size_t index) {
   DCHECK_NE(NULL, parameters_);
   DCHECK(index < parameter_count());
   return parameters_[index];
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8