Remove unused Zone argument from InitializeAstVisitor

test/cctest/expression-type-collector.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/v8.h"
 
 #include "test/cctest/expression-type-collector.h"
 
 #include "src/ast.h"
 #include "src/codegen.h"
@@ skipping 11 matching lines @@
   { AstNode::k##type, #type } \
   ,
     AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 };
 
 }  // namespace
 
 
 ExpressionTypeCollector::ExpressionTypeCollector(
-    Isolate* isolate, Zone* zone, FunctionLiteral* root,
+    Isolate* isolate, FunctionLiteral* root,
     ZoneVector<ExpressionTypeEntry>* dst)
-    : AstExpressionVisitor(isolate, zone, root), result_(dst) {}
+    : AstExpressionVisitor(isolate, root), result_(dst) {}
 
 
 void ExpressionTypeCollector::Run() {
   result_->clear();
   AstExpressionVisitor::Run();
 }
 
 
 void ExpressionTypeCollector::VisitExpression(Expression* expression) {
   ExpressionTypeEntry e;
   e.depth = depth();
   VariableProxy* proxy = expression->AsVariableProxy();
   if (proxy) {
     e.name = proxy->raw_name();
   }
   e.bounds = expression->bounds();
   AstNode::NodeType type = expression->node_type();
   e.kind = "unknown";
   for (size_t i = 0; i < arraysize(NodeTypeNameList); ++i) {
     if (NodeTypeNameList[i].type == type) {
       e.kind = NodeTypeNameList[i].name;
       break;
     }
   }
   result_->push_back(e);
 }
 
 }  // namespace internal
 }  // namespace v8