Remove unused Zone argument from InitializeAstVisitor

test/cctest/test-ast-expression-visitor.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 <stdlib.h>
 
 #include "src/v8.h"
 
 #include "src/ast.h"
 #include "src/ast-expression-visitor.h"
@@ skipping 22 matching lines @@
   i::Parser parser(&info);
   parser.set_allow_harmony_sloppy(true);
   info.set_global();
   info.set_lazy(false);
   info.set_allow_lazy_parsing(false);
   info.set_toplevel(true);
 
   CHECK(i::Compiler::ParseAndAnalyze(&info));
 
   ExpressionTypeCollector(
-      isolate, handles->main_zone(),
+      isolate,
       info.scope()->declarations()->at(0)->AsFunctionDeclaration()->fun(), dst)
       .Run();
 }
 
 }  // namespace
 
 
 TEST(VisitExpressions) {
   v8::V8::Initialize();
   HandleAndZoneScope handles;
@@ skipping 329 matching lines @@
     CHECK_EXPR(FunctionLiteral, Bounds::Unbounded()) {
       CHECK_EXPR(BinaryOperation, Bounds::Unbounded()) {
         // Skip x + x
         CHECK_SKIP();
         CHECK_EXPR(Literal, Bounds::Unbounded());
       }
     }
   }
   CHECK_TYPES_END
 }