[builtins] Turn StoreIC_Miss and StoreIC_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 403d1e8425582e2e713c960e8946d7949bd951b8..9fa5c1e8e600c6dd3c2870212beb7e36e58e25c1 100644
--- a/src/ic/x64/handler-compiler-x64.cc
+++ b/src/ic/x64/handler-compiler-x64.cc
@@ -340,15 +340,6 @@ static void StoreIC_PushArgs(MacroAssembler* masm) {
 }
 
 
-void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) {
-  // Return address is on the stack.
-  StoreIC_PushArgs(masm);
-
-  // Do tail-call to runtime routine.
-  __ TailCallRuntime(Runtime::kStoreIC_Slow);
-}
-
-
 void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) {
   // Return address is on the stack.
   StoreIC_PushArgs(masm);