Remove the dependency of Zone on Isolate

test/cctest/compiler/simplified-graph-builder.h

 // 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.
 
 #ifndef V8_CCTEST_COMPILER_SIMPLIFIED_GRAPH_BUILDER_H_
 #define V8_CCTEST_COMPILER_SIMPLIFIED_GRAPH_BUILDER_H_
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-builder.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/simplified-operator.h"
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/call-tester.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class SimplifiedGraphBuilder : public GraphBuilder {
  public:
-  SimplifiedGraphBuilder(Graph* graph, CommonOperatorBuilder* common,
+  SimplifiedGraphBuilder(Isolate* isolate, Graph* graph,
+                         CommonOperatorBuilder* common,
                          MachineOperatorBuilder* machine,
                          SimplifiedOperatorBuilder* simplified);
   virtual ~SimplifiedGraphBuilder() {}
 
   Zone* zone() const { return graph()->zone(); }
-  Isolate* isolate() const { return zone()->isolate(); }
   CommonOperatorBuilder* common() const { return common_; }
   MachineOperatorBuilder* machine() const { return machine_; }
   SimplifiedOperatorBuilder* simplified() const { return simplified_; }
 
   // Initialize graph and builder.
   void Begin(int num_parameters);
 
   void Return(Node* value);
 
   // Close the graph.
@@ skipping 107 matching lines @@
   CommonOperatorBuilder* common_;
   MachineOperatorBuilder* machine_;
   SimplifiedOperatorBuilder* simplified_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_SIMPLIFIED_GRAPH_BUILDER_H_