Replace special IC builtins and stubs in the map's cache by codestubs.

src/x64/ic-x64.cc

Index: src/x64/ic-x64.cc
diff --git a/src/x64/ic-x64.cc b/src/x64/ic-x64.cc
index 657c88aab7209625bcaee75d0e939341c6e21277..f903f8719684068e76eea16f941902f7feb7eb0b 100644
--- a/src/x64/ic-x64.cc
+++ b/src/x64/ic-x64.cc
@@ -238,21 +238,6 @@ void LoadIC::GenerateArrayLength(MacroAssembler* masm) {
 }
 
 
-void LoadIC::GenerateStringLength(MacroAssembler* masm, bool support_wrappers) {
-  // ----------- S t a t e -------------
-  //  -- rax    : receiver
-  //  -- rcx    : name
-  //  -- rsp[0] : return address
-  // -----------------------------------
-  Label miss;
-
-  StubCompiler::GenerateLoadStringLength(masm, rax, rdx, rbx, &miss,
-                                         support_wrappers);
-  __ bind(&miss);
-  StubCompiler::GenerateLoadMiss(masm, Code::LOAD_IC);
-}
-
-
 void LoadIC::GenerateFunctionPrototype(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : receiver