Add MEGAMORPHIC state support for KeyedStoreIC

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index c52d22852d0deb8fd4f3e9a0ea9462eadbab6147..4d2fa0a76e786e5d95f457b34d4988bd9c0ce0eb 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1314,13 +1314,23 @@ static void Generate_StoreIC_Setter_ForDeopt(MacroAssembler* masm) {
 }
 
 
+static void Generate_KeyedStoreIC_Megamorphic(MacroAssembler* masm) {
+  KeyedStoreIC::GenerateGeneric(masm, SLOPPY, kMissOnMissingHandler);
+}
+
+
+static void Generate_KeyedStoreIC_Megamorphic_Strict(MacroAssembler* masm) {
+  KeyedStoreIC::GenerateGeneric(masm, STRICT, kMissOnMissingHandler);
+}
+
+
 static void Generate_KeyedStoreIC_Generic(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateGeneric(masm, SLOPPY);
+  KeyedStoreIC::GenerateGeneric(masm, SLOPPY, kCallRuntimeOnMissingHandler);
 }
 
 
 static void Generate_KeyedStoreIC_Generic_Strict(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateGeneric(masm, STRICT);
+  KeyedStoreIC::GenerateGeneric(masm, STRICT, kCallRuntimeOnMissingHandler);
 }