Reland "Turn ElementsTransitionAndStore stub into a HydrogenCodeStub".

src/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1058 matching lines @@
                                     ElementsKind kind,
                                     HValue* length,
                                     HValue* key,
                                     bool is_js_array);
 
   HValue* BuildCopyElementsOnWrite(HValue* object,
                                    HValue* elements,
                                    ElementsKind kind,
                                    HValue* length);
 
+  void BuildTransitionElementsKind(HValue* object,
+                                   HValue* map,
+                                   ElementsKind from_kind,
+                                   ElementsKind to_kind,
+                                   bool is_jsarray);
+
   HInstruction* BuildUncheckedMonomorphicElementAccess(
       HValue* object,
       HValue* key,
       HValue* val,
       HCheckMaps* mapcheck,
       bool is_js_array,
       ElementsKind elements_kind,
       bool is_store,
       LoadKeyedHoleMode load_mode,
       KeyedAccessStoreMode store_mode);
@@ skipping 1001 matching lines @@
   EmbeddedVector<char, 64> filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_