Use a simpler KeyedStoreGeneric stub

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 27d30545e3e3a3b9286f4d5ffe37673f2758d9a9..dca20379e9b846c70d9136ec9ba6ac0b91b72e25 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1310,22 +1310,22 @@ static void Generate_StoreIC_Setter_ForDeopt(MacroAssembler* masm) {
 
 
 static void Generate_KeyedStoreIC_Megamorphic(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateGeneric(masm, SLOPPY, kMissOnMissingHandler);
+  KeyedStoreIC::GenerateMegamorphic(masm, SLOPPY);
 }
 
 
 static void Generate_KeyedStoreIC_Megamorphic_Strict(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateGeneric(masm, STRICT, kMissOnMissingHandler);
+  KeyedStoreIC::GenerateMegamorphic(masm, STRICT);
 }
 
 
 static void Generate_KeyedStoreIC_Generic(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateGeneric(masm, SLOPPY, kCallRuntimeOnMissingHandler);
+  KeyedStoreIC::GenerateGeneric(masm, SLOPPY);
 }
 
 
 static void Generate_KeyedStoreIC_Generic_Strict(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateGeneric(masm, STRICT, kCallRuntimeOnMissingHandler);
+  KeyedStoreIC::GenerateGeneric(masm, STRICT);
 }