X64: Added inline keyed load/store and a bunch of other missing functions.

src/ic.h

Index: src/ic.h
diff --git a/src/ic.h b/src/ic.h
index 593519b4205d0212b4bec9bc417c17e6dd087ff7..466260157d188ffccd70ef885cbf10612c6eda3a 100644
--- a/src/ic.h
+++ b/src/ic.h
@@ -387,6 +387,10 @@ class KeyedStoreIC: public IC {
 
   // Support for patching the map that is checked in an inlined
   // version of keyed store.
+  // The address is the patch point for the IC call
+  // (Assembler::kTargetAddrToReturnAddrDist before the end of
+  // the call/return address).
+  // The map is the new map that the inlined code should check against.
   static bool PatchInlinedStore(Address address, Object* map);
 
   friend class IC;