Hydrogenize (and share) part of StoreTransition handler as a StoreTransitionStub.

src/code-stubs.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/cpu-profiler.h"
 #include "src/factory.h"
@@ skipping 594 matching lines @@
   descriptor->Initialize(FUNCTION_ADDR(KeyedStoreIC_MissFromStubFailure));
 }
 
 
 void ElementsTransitionAndStoreStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   descriptor->Initialize(FUNCTION_ADDR(ElementsTransitionAndStoreIC_Miss));
 }
 
 
-CallInterfaceDescriptor ExtendStorageStub::GetCallInterfaceDescriptor() {
-  return ExtendStorageDescriptor(isolate());
+CallInterfaceDescriptor StoreTransitionStub::GetCallInterfaceDescriptor() {
+  return StoreTransitionDescriptor(isolate());
 }
 
 
 static void InitializeVectorLoadStub(Isolate* isolate,
                                      CodeStubDescriptor* descriptor,
                                      Address deoptimization_handler) {
   DCHECK(FLAG_vector_ics);
   descriptor->Initialize(deoptimization_handler);
 }
 
@@ skipping 330 matching lines @@
 }
 
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(
     Isolate* isolate) : PlatformCodeStub(isolate) {
   InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 } }  // namespace v8::internal