Revert of ES6 computed property names

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 86fa8c55c25997fc5b4f6df0445753ef9b7d90d7..987d60b334115809200ccec79c35c489da3ffaa6 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5607,12 +5607,9 @@
 
   for (int i = 0; i < expr->properties()->length(); i++) {
     ObjectLiteral::Property* property = expr->properties()->at(i);
-    if (property->is_computed_name()) {
-      return Bailout(kComputedPropertyName);
-    }
     if (property->IsCompileTimeValue()) continue;
 
-    Literal* key = property->key()->AsLiteral();
+    Literal* key = property->key();
     Expression* value = property->value();
 
     switch (property->kind()) {
@@ -5638,7 +5635,7 @@
             }
 
             Handle<Map> map = property->GetReceiverType();
-            Handle<String> name = key->AsPropertyName();
+            Handle<String> name = property->key()->AsPropertyName();
             HInstruction* store;
             if (map.is_null()) {
               // If we don't know the monomorphic type, do a generic store.