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

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index f9f6eea9d0a4b04fa829c91686887ace5ad81a1a..ec81a0a3207c6899c39169df7538402cbef3f82b 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -511,8 +511,7 @@ void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
   NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, r8,
                                                           r9, &miss);
   __ bind(&miss);
-  PropertyAccessCompiler::TailCallBuiltin(
-      masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC));
+  PropertyAccessCompiler::TailCallMissHandler(masm, Code::LOAD_IC);
 }
 
 
@@ -543,8 +542,7 @@ void LoadIndexedStringStub::Generate(MacroAssembler* masm) {
   char_at_generator.GenerateSlow(masm, PART_OF_IC_HANDLER, call_helper);
 
   __ bind(&miss);
-  PropertyAccessCompiler::TailCallBuiltin(
-      masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC));
+  PropertyAccessCompiler::TailCallMissHandler(masm, Code::KEYED_LOAD_IC);
 }