ES6 symbols: turn symbols into a proper primitive type

src/ia32/builtins-ia32.cc

Index: src/ia32/builtins-ia32.cc
diff --git a/src/ia32/builtins-ia32.cc b/src/ia32/builtins-ia32.cc
index afb1c030ede170de9281e23d843e7fab563caaf5..ff5ee538780f1836c1679cba6a797361f1b2ed2b 100644
--- a/src/ia32/builtins-ia32.cc
+++ b/src/ia32/builtins-ia32.cc
@@ -409,10 +409,6 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
     __ j(above_equal, &exit);
 
-    // Symbols are "objects".
-    __ CmpInstanceType(ecx, SYMBOL_TYPE);
-    __ j(equal, &exit);
-
     // Throw away the result of the constructor invocation and use the
     // on-stack receiver as the result.
     __ bind(&use_receiver);