Zonify types in compiler frontend

src/type-info.h

Index: src/type-info.h
diff --git a/src/type-info.h b/src/type-info.h
index 635be1a8076231f1a4fdb29fed0e2b4390aecbc2..0c5c40d60daf5f74e788698637b91eaa8b29b1bb 100644
--- a/src/type-info.h
+++ b/src/type-info.h
@@ -45,7 +45,6 @@ class TypeFeedbackOracle: public ZoneObject {
  public:
   TypeFeedbackOracle(Handle<Code> code,
                      Handle<Context> native_context,
-                     Isolate* isolate,
                      Zone* zone);
 
   bool LoadIsUninitialized(TypeFeedbackId id);
@@ -108,21 +107,21 @@ class TypeFeedbackOracle: public ZoneObject {
 
   // Get type information for arithmetic operations and compares.
   void BinaryType(TypeFeedbackId id,
-                  Handle<Type>* left,
-                  Handle<Type>* right,
-                  Handle<Type>* result,
+                  Type** left,
+                  Type** right,
+                  Type** result,
                   Maybe<int>* fixed_right_arg,
                   Token::Value operation);
 
   void CompareType(TypeFeedbackId id,
-                   Handle<Type>* left,
-                   Handle<Type>* right,
-                   Handle<Type>* combined);
+                   Type** left,
+                   Type** right,
+                   Type** combined);
 
-  Handle<Type> CountType(TypeFeedbackId id);
+  Type* CountType(TypeFeedbackId id);
 
   Zone* zone() const { return zone_; }
-  Isolate* isolate() const { return isolate_; }
+  Isolate* isolate() const { return zone_->isolate(); }
 
  private:
   void CollectReceiverTypes(TypeFeedbackId id,
@@ -150,7 +149,6 @@ class TypeFeedbackOracle: public ZoneObject {
 
  private:
   Handle<Context> native_context_;
-  Isolate* isolate_;
   Zone* zone_;
   Handle<UnseededNumberDictionary> dictionary_;