Filter out maps from different global context when collecting type feedback.

src/type-info.h

Index: src/type-info.h
===================================================================
--- src/type-info.h	(revision 10237)
+++ src/type-info.h	(working copy)
@@ -256,6 +256,8 @@
   void CollectKeyedReceiverTypes(unsigned ast_id,
                                  SmallMapList* types);
 
+  static bool InSameContext(Handle<Map> map, Handle<Context> global_context);

[Vyacheslav Egorov (Chromium), 2011/12/12 13:34:44]

I would better call it: WillRetainDifferentContext or something like this (and
invert true and false) because it returns true if it can't determine context for
example.

This name would also reflect it's purpose (you should also add a comment why
this function&filtering was introduced).

+
   CheckType GetCallCheckType(Call* expr);
   Handle<JSObject> GetPrototypeForPrimitiveCheck(CheckType check);