Add MEGAMORPHIC state support for KeyedStoreIC

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index e1facd6358313813f1a0bdfa9cb73510790b975e..98fc9a8fd474b1fd2571026849f5f0549bdfa20d 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -223,7 +223,6 @@ class IC {
     return target_maps_.length() > 0 ? *target_maps_.at(0) : NULL;
   }
 
- protected:
   inline void UpdateTarget();
 
  private:
@@ -526,6 +525,12 @@ enum KeyedStoreCheckMap { kDontCheckMap, kCheckMap };
 enum KeyedStoreIncrementLength { kDontIncrementLength, kIncrementLength };
 
 
+enum KeyedStoreStubCacheRequirement {
+  kCallRuntimeOnMissingHandler,
+  kMissOnMissingHandler
+};
+
+
 class KeyedStoreIC : public StoreIC {
  public:
   // ExtraICState bits (building on IC)
@@ -559,7 +564,9 @@ class KeyedStoreIC : public StoreIC {
   }
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateSlow(MacroAssembler* masm);
-  static void GenerateGeneric(MacroAssembler* masm, StrictMode strict_mode);
+  static void GenerateGeneric(
+      MacroAssembler* masm, StrictMode strict_mode,
+      KeyedStoreStubCacheRequirement handler_requirement);
   static void GenerateSloppyArguments(MacroAssembler* masm);
 
  protected: