Replace miss_mode flag with explicit Load/Store Force Generic methods.

src/ic.h

Index: src/ic.h
diff --git a/src/ic.h b/src/ic.h
index 8cc6c9380937d28253974c6a37fe73d2259235df..c3a31639aa0661ab2da12645900e076e9b02dbb8 100644
--- a/src/ic.h
+++ b/src/ic.h
@@ -479,9 +479,11 @@ class KeyedLoadIC: public LoadIC {
     ASSERT(target()->is_keyed_load_stub());
   }
 
+  MUST_USE_RESULT MaybeObject* LoadForceGeneric(Handle<Object> object,
+                                                Handle<Object> key);
+
   MUST_USE_RESULT MaybeObject* Load(Handle<Object> object,
-                                    Handle<Object> key,
-                                    ICMissMode force_generic);
+                                    Handle<Object> key);
 
   // Code generator routines.
   static void GenerateMiss(MacroAssembler* masm, ICMissMode force_generic);
@@ -680,10 +682,12 @@ class KeyedStoreIC: public StoreIC {
     ASSERT(target()->is_keyed_store_stub());
   }
 
+  MUST_USE_RESULT MaybeObject* StoreForceGeneric(Handle<Object> object,
+                                                 Handle<Object> name,
+                                                 Handle<Object> value);
   MUST_USE_RESULT MaybeObject* Store(Handle<Object> object,
                                      Handle<Object> name,
-                                     Handle<Object> value,
-                                     ICMissMode force_generic);
+                                     Handle<Object> value);
 
   // Code generators for stub routines.  Only called once at startup.
   static void GenerateInitialize(MacroAssembler* masm) {