Create and use shared stub for for DictionaryValue-based elements.

src/stub-cache.h

Index: src/stub-cache.h
diff --git a/src/stub-cache.h b/src/stub-cache.h
index fa2676061d5faf9d957de1130af540be0083d200..93c50fa988f285ce07f64863c92fd844b0fbef14 100644
--- a/src/stub-cache.h
+++ b/src/stub-cache.h
@@ -662,12 +662,12 @@ class KeyedLoadStubCompiler: public StubCompiler {
 
   static void GenerateLoadFastElement(MacroAssembler* masm);
 
+  static void GenerateLoadDictionaryElement(MacroAssembler* masm);
+
  private:
   MaybeObject* GetCode(PropertyType type,
                        String* name,
                        InlineCacheState state = MONOMORPHIC);
-
-  MaybeObject* ComputeSharedKeyedLoadElementStub(Map* receiver_map);
 };
 
 
@@ -720,13 +720,13 @@ class KeyedStoreStubCompiler: public StubCompiler {
   static void GenerateStoreExternalArray(MacroAssembler* masm,
                                          JSObject::ElementsKind elements_kind);
 
+  static void GenerateStoreDictionaryElement(MacroAssembler* masm);
+
  private:
   MaybeObject* GetCode(PropertyType type,
                        String* name,
                        InlineCacheState state = MONOMORPHIC);
 
-  MaybeObject* ComputeSharedKeyedStoreElementStub(Map* receiver_map);
-
   StrictModeFlag strict_mode_;
 };