[ic] Support non-code handlers in megamorphic stub cache.

src/ic/stub-cache.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_STUB_CACHE_H_
 #define V8_STUB_CACHE_H_
 
 #include "src/macro-assembler.h"
 
 namespace v8 {
@@ skipping 17 matching lines @@
   Address address_;
 
   friend class StubCache;
 };
 
 
 class StubCache {
  public:
   struct Entry {
     Name* key;
-    Code* value;
+    Object* value;
     Map* map;
   };
 
   void Initialize();
   // Access cache for entry hash(name, map).
-  Code* Set(Name* name, Map* map, Code* code);
-  Code* Get(Name* name, Map* map);
+  Object* Set(Name* name, Map* map, Object* handler);
+  Object* Get(Name* name, Map* map);
   // Clear the lookup table (@ mark compact collection).
   void Clear();
   // Collect all maps that match the name.
   void CollectMatchingMaps(SmallMapList* types, Handle<Name> name,
                            Handle<Context> native_context, Zone* zone);
   // Generate code for probing the stub cache table.
   // Arguments extra, extra2 and extra3 may be used to pass additional scratch
   // registers. Set to no_reg if not needed.
   // If leave_frame is true, then exit a frame before the tail call.
   void GenerateProbe(MacroAssembler* masm, Register receiver, Register name,
@@ skipping 112 matching lines @@
 
   friend class Isolate;
   friend class SCTableReference;
 
   DISALLOW_COPY_AND_ASSIGN(StubCache);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_STUB_CACHE_H_