Remove the dependency of Zone on Isolate

src/type-info.h

Index: src/type-info.h
diff --git a/src/type-info.h b/src/type-info.h
index 60f156f5f3da7dc980c28c7fd8dad3c4b6212c15..e9653d5833129c24065cbb03774bc4b879f49092 100644
--- a/src/type-info.h
+++ b/src/type-info.h
@@ -19,9 +19,9 @@ class SmallMapList;
 
 class TypeFeedbackOracle: public ZoneObject {
  public:
-  TypeFeedbackOracle(Handle<Code> code,
+  TypeFeedbackOracle(Isolate* isolate, Zone* zone, Handle<Code> code,
                      Handle<TypeFeedbackVector> feedback_vector,
-                     Handle<Context> native_context, Zone* zone);
+                     Handle<Context> native_context);
 
   bool LoadIsUninitialized(TypeFeedbackId id);
   bool LoadIsUninitialized(FeedbackVectorICSlot slot);
@@ -101,7 +101,7 @@ class TypeFeedbackOracle: public ZoneObject {
   Type* CountType(TypeFeedbackId id);
 
   Zone* zone() const { return zone_; }
-  Isolate* isolate() const { return zone_->isolate(); }
+  Isolate* isolate() const { return isolate_; }
 
  private:
   void CollectReceiverTypes(TypeFeedbackId id,
@@ -137,6 +137,7 @@ class TypeFeedbackOracle: public ZoneObject {
 
  private:
   Handle<Context> native_context_;
+  Isolate* isolate_;
   Zone* zone_;
   Handle<UnseededNumberDictionary> dictionary_;
   Handle<TypeFeedbackVector> feedback_vector_;