ES6: Add support for explicit octal and binary integer literals

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 8391bef9490d150e6318de906020622029737a53..3b721f7c93a83e08dc4a3f95d8a7767d5c732f44 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -5959,8 +5959,14 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringToNumber) {
   }
 
   // Slower case.
+  int flags = ALLOW_HEX;
+  if (FLAG_harmony_numeric_literals) {
+    // The current spec draft has not updated "ToNumber Applied to the String
+    // Type", https://bugs.ecmascript.org/show_bug.cgi?id=1584
+    flags |= ALLOW_OCTAL | ALLOW_BINARY;
+  }
   return isolate->heap()->NumberFromDouble(
-      StringToDouble(isolate->unicode_cache(), subject, ALLOW_HEX));
+      StringToDouble(isolate->unicode_cache(), subject, flags));
 }