Always use the StoreFieldStub to do the actual storing.

src/code-stubs.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_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 972 matching lines @@
     int property_index_key = index_.GetFieldAccessStubKey();
     bit_field_ = EncodedStoreFieldByIndexBits::encode(property_index_key) |
                  RepresentationBits::encode(
                      PropertyDetails::EncodeRepresentation(representation));
   }
 
   virtual Handle<Code> GenerateCode() V8_OVERRIDE;
 
   FieldIndex index() const { return index_; }
   Representation representation() { return representation_; }
+  static void InstallDescriptors(Isolate* isolate);
 
  protected:
   explicit StoreFieldStub(Isolate* isolate);
   virtual Code::Kind kind() const { return Code::STORE_IC; }
   virtual Code::StubType GetStubType() { return Code::FAST; }
 
  private:
   class EncodedStoreFieldByIndexBits : public BitField<int, 0, 13> {};
   class RepresentationBits : public BitField<int, 13, 4> {};
   virtual CodeStub::Major MajorKey() const { return StoreField; }
@@ skipping 1506 matching lines @@
 
 
 class CallDescriptors {
  public:
   static void InitializeForIsolate(Isolate* isolate);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_