ES6 symbols: Allow symbols as property names

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index cfc694d4e63900ae02e545ee5be07cdf3a17b58a..da499d88dd3e251aad87bf866222f916a8903c17 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -421,6 +421,15 @@ class MacroAssembler: public Assembler {
                                Register map,
                                Register instance_type);
 
+  // Check if the object in register heap_object is a name. Afterwards the
+  // register map contains the object map and the register instance_type
+  // contains the instance_type. The registers map and instance_type can be the
+  // same in which case it contains the instance type afterwards. Either of the
+  // registers map and instance_type can be the same as heap_object.
+  Condition IsObjectNameType(Register heap_object,
+                             Register map,
+                             Register instance_type);
+
   // Check if a heap object's type is in the JSObject range, not including
   // JSFunction.  The object's map will be loaded in the map register.
   // Any or all of the three registers may be the same.
@@ -511,6 +520,9 @@ class MacroAssembler: public Assembler {
   // Abort execution if argument is not a string, enabled via --debug-code.
   void AssertString(Register object);
 
+  // Abort execution if argument is not a name, enabled via --debug-code.
+  void AssertName(Register object);
+
   // ---------------------------------------------------------------------------
   // Exception handling