Remove CanRetainOtherContext since embedded objects are now weak.

src/type-info.h

 // Copyright 2012 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.
 
 #ifndef V8_TYPE_INFO_H_
 #define V8_TYPE_INFO_H_
 
 #include "src/allocation.h"
 #include "src/globals.h"
 #include "src/types.h"
@@ skipping 49 matching lines @@
                                     KeyedAccessStoreMode* store_mode,
                                     IcCheckType* key_type);
   void CountReceiverTypes(TypeFeedbackId id,
                           SmallMapList* receiver_types);
 
   void CollectReceiverTypes(TypeFeedbackId id,
                             SmallMapList* types);
   template <class T>
   void CollectReceiverTypes(T* obj, SmallMapList* types);
 
-  static bool CanRetainOtherContext(Map* map, Context* native_context);
-  static bool CanRetainOtherContext(JSFunction* function,
-                                    Context* native_context);
+  static bool IsRelevantFeedback(Map* map, Context* native_context) {
+    Object* constructor = map->GetConstructor();
+    return !constructor->IsJSFunction() ||
+           JSFunction::cast(constructor)->context()->native_context() ==
+               native_context;
+  }
 
   Handle<JSFunction> GetCallTarget(FeedbackVectorICSlot slot);
   Handle<AllocationSite> GetCallAllocationSite(FeedbackVectorICSlot slot);
   Handle<JSFunction> GetCallNewTarget(FeedbackVectorSlot slot);
   Handle<AllocationSite> GetCallNewAllocationSite(FeedbackVectorSlot slot);
 
   bool LoadIsBuiltin(TypeFeedbackId id, Builtins::Name builtin_id);
 
   // TODO(1571) We can't use ToBooleanStub::Types as the return value because
   // of various cycles in our headers. Death to tons of implementations in
@@ skipping 55 matching lines @@
   Zone* zone_;
   Handle<UnseededNumberDictionary> dictionary_;
   Handle<TypeFeedbackVector> feedback_vector_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPE_INFO_H_