X64: Enable inline caching for calls, with some stubs stubbed out.

src/ic.cc

Index: src/ic.cc
===================================================================
--- src/ic.cc	(revision 2477)
+++ src/ic.cc	(working copy)
@@ -365,13 +365,10 @@
     return TypeError("undefined_method", object, name);
   }
 
-  // TODO(X64): Enable inline cache for calls.
-#ifndef V8_TARGET_ARCH_X64
   // Lookup is valid: Update inline cache and stub cache.
   if (FLAG_use_ic && lookup.IsLoaded()) {
     UpdateCaches(&lookup, state, object, name);
   }
-#endif
 
   // Get the property.
   PropertyAttributes attr;
@@ -1252,11 +1249,6 @@
 }
 
 
-void CallIC::GeneratePreMonomorphic(MacroAssembler* masm, int argc) {
-  Generate(masm, argc, ExternalReference(IC_Utility(kCallIC_Miss)));
-}
-
-
 void CallIC::GenerateMiss(MacroAssembler* masm, int argc) {
   Generate(masm, argc, ExternalReference(IC_Utility(kCallIC_Miss)));
 }