Fix issue with numeric property names

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index 2c8e405ceea9242d23417ceb632693e9105611ac..793903bf5b06abd27e7662328abc2b5dd9851026 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -1248,6 +1248,7 @@ class PreParserTraits {
 
   // Producing data during the recursive descent.
   PreParserIdentifier GetSymbol(Scanner* scanner);
+  PreParserIdentifier GetNumberAsSymbol(Scanner* scanner);
 
   static PreParserIdentifier GetNextSymbol(Scanner* scanner) {
     return PreParserIdentifier::Default();
@@ -1893,10 +1894,7 @@ typename ParserBase<Traits>::ObjectLiteralPropertyT ParserBase<
             break;
           case Token::NUMBER:
             Consume(Token::NUMBER);
-            // TODO(arv): Fix issue with numeric keys. get 1.0() should be
-            // treated as if the key was '1'
-            // https://code.google.com/p/v8/issues/detail?id=3507
-            name = this->GetSymbol(scanner_);
+            name = this->GetNumberAsSymbol(scanner_);
             break;
           default:
             name = ParseIdentifierName(