[builtins] Turn LoadIC_Miss and LoadIC_Slow builtins to TurboFan code stubs.

src/ic/x64/handler-compiler-x64.cc

Index: src/ic/x64/handler-compiler-x64.cc
diff --git a/src/ic/x64/handler-compiler-x64.cc b/src/ic/x64/handler-compiler-x64.cc
index 348f79cb21df0b22cd80e3d41c39da6fe8b4df85..19d51648fd43e2c4c1451733e69eaadefad1bebf 100644
--- a/src/ic/x64/handler-compiler-x64.cc
+++ b/src/ic/x64/handler-compiler-x64.cc
@@ -548,7 +548,7 @@ void NamedLoadHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) {
       DCHECK(kind() == Code::LOAD_IC);
       PopVectorAndSlot();
     }
-    TailCallBuiltin(masm(), MissBuiltin(kind()));
+    TailCallMissHandler(masm(), kind());
     __ bind(&success);
   }
 }
@@ -560,7 +560,7 @@ void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) {
     __ jmp(&success);
     GenerateRestoreName(miss, name);
     if (IC::ICUseVector(kind())) PopVectorAndSlot();
-    TailCallBuiltin(masm(), MissBuiltin(kind()));
+    TailCallMissHandler(masm(), kind());
     __ bind(&success);
   }
 }