Correctify instanceof and make it optimizable.

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 7852d39c03265e88c4afb86bd52220a7782f2b86..d78e417afccbd9e5459903788aec4e6346fe0c4b 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1240,10 +1240,7 @@ class MacroAssembler: public Assembler {
   // function and jumps to the miss label if the fast checks fail. The
   // function register will be untouched; the other register may be
   // clobbered.
-  void TryGetFunctionPrototype(Register function,
-                               Register result,
-                               Label* miss,
-                               bool miss_on_bound_function = false);
+  void TryGetFunctionPrototype(Register function, Register result, Label* miss);
 
   // Picks out an array index from the hash field.
   // Register use: