Revert of ES6 computed property names

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 9f4075eb470cbc5bd2010fc959c8cb6da9d541d2..987d60b334115809200ccec79c35c489da3ffaa6 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5552,13 +5552,6 @@
   DCHECK(!HasStackOverflow());
   DCHECK(current_block() != NULL);
   DCHECK(current_block()->HasPredecessor());
-
-  for (int i = 0; i < expr->properties()->length(); i++) {
-    if (expr->properties()->at(i)->is_computed_name()) {
-      return Bailout(kComputedPropertyName);
-    }
-  }
-
   expr->BuildConstantProperties(isolate());
   Handle<JSFunction> closure = function_state()->compilation_info()->closure();
   HInstruction* literal;
@@ -5614,10 +5607,9 @@
 
   for (int i = 0; i < expr->properties()->length(); i++) {
     ObjectLiteral::Property* property = expr->properties()->at(i);
-    DCHECK(!property->is_computed_name());
     if (property->IsCompileTimeValue()) continue;
 
-    Literal* key = property->key()->AsLiteral();
+    Literal* key = property->key();
     Expression* value = property->value();
 
     switch (property->kind()) {
@@ -5643,7 +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.