Fix TransitionElementsKindStub to handle non-JSArray objects correctly.

src/code-stubs-hydrogen.cc

 // 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 627 matching lines @@
 
 
 template <>
 HValue* CodeStubGraphBuilder<TransitionElementsKindStub>::BuildCodeStub() {
   info()->MarkAsSavesCallerDoubles();
 
   BuildTransitionElementsKind(GetParameter(0),
                               GetParameter(1),
                               casted_stub()->from_kind(),
                               casted_stub()->to_kind(),
-                              true);
+                              casted_stub()->is_js_array());
 
   return GetParameter(0);
 }
 
 
 Handle<Code> TransitionElementsKindStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 HValue* CodeStubGraphBuilderBase::BuildArrayConstructor(
@@ skipping 771 matching lines @@
   return BuildRegExpConstructResult(length, index, input);
 }
 
 
 Handle<Code> RegExpConstructResultStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 
 } }  // namespace v8::internal