Move (uppercase) JS builtins from js builtins object to native context.

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index f8076cc1bb7752afc8d9e432a21ef6e08d14898a..9f4ccd15ad5c694103341031c1a9aa70a9b7eb46 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -610,8 +610,7 @@ class BinaryOpIC : public IC {
  public:
   explicit BinaryOpIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {}
 
-  static Builtins::JavaScript TokenToJSBuiltin(Token::Value op,
-                                               Strength strength);
+  static int TokenToContextIndex(Token::Value op, Strength strength);
 
   MaybeHandle<Object> Transition(Handle<AllocationSite> allocation_site,
                                  Handle<Object> left,