Remove the dependency of Zone on Isolate

test/cctest/test-types.cc

 // Copyright 2013 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 <vector>
 
 #include "src/hydrogen-types.h"
 #include "src/isolate-inl.h"
 #include "src/types.h"
 #include "test/cctest/cctest.h"
@@ skipping 85 matching lines @@
   typedef Types<Type, TypeHandle, Region> TypesInstance;
   typedef typename TypesInstance::TypeVector::iterator TypeIterator;
   typedef typename TypesInstance::MapVector::iterator MapIterator;
   typedef typename TypesInstance::ValueVector::iterator ValueIterator;
 
   Isolate* isolate;
   HandleScope scope;
   Zone zone;
   TypesInstance T;
 
-  Tests() :
-      isolate(CcTest::i_isolate()),
-      scope(isolate),
-      zone(isolate),
-      T(Rep::ToRegion(&zone, isolate), isolate) {
-  }
+  Tests()
+      : isolate(CcTest::i_isolate()),
+        scope(isolate),
+        zone(),
+        T(Rep::ToRegion(&zone, isolate), isolate) {}
 
   bool Equal(TypeHandle type1, TypeHandle type2) {
     return
         type1->Equals(type2) &&
         this->IsBitset(type1) == this->IsBitset(type2) &&
         this->IsUnion(type1) == this->IsUnion(type2) &&
         type1->NumClasses() == type2->NumClasses() &&
         type1->NumConstants() == type2->NumConstants() &&
         (!this->IsBitset(type1) ||
           this->AsBitset(type1) == this->AsBitset(type2)) &&
@@ skipping 1959 matching lines @@
   ZoneTests().Convert<HeapType, Handle<HeapType>, Isolate, HeapRep>();
   HeapTests().Convert<Type, Type*, Zone, ZoneRep>();
 }
 
 
 TEST(HTypeFromType) {
   CcTest::InitializeVM();
   ZoneTests().HTypeFromType();
   HeapTests().HTypeFromType();
 }