[v8natives.js] updating comments to ES6

src/runtime/runtime-numbers.cc

Index: src/runtime/runtime-numbers.cc
diff --git a/src/runtime/runtime-numbers.cc b/src/runtime/runtime-numbers.cc
index f976df951c119a3fba5f63fe33c33ad8574c1124..77e29f7168aa077fce36c754f019f246a2fd1ad7 100644
--- a/src/runtime/runtime-numbers.cc
+++ b/src/runtime/runtime-numbers.cc
@@ -114,11 +114,13 @@ RUNTIME_FUNCTION(Runtime_StringToNumber) {
 }
 
 
+// ES6 18.2.5 parseInt(string, radix) slow path
 RUNTIME_FUNCTION(Runtime_StringParseInt) {
   HandleScope handle_scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
   CONVERT_NUMBER_CHECKED(int, radix, Int32, args[1]);
+  // Step 8.a. is already handled in the JS function.
   RUNTIME_ASSERT(radix == 0 || (2 <= radix && radix <= 36));
 
   subject = String::Flatten(subject);
@@ -128,7 +130,6 @@ RUNTIME_FUNCTION(Runtime_StringParseInt) {
     DisallowHeapAllocation no_gc;
     String::FlatContent flat = subject->GetFlatContent();
 
-    // ECMA-262 section 15.1.2.3, empty string is NaN
     if (flat.IsOneByte()) {
       value =
           StringToInt(isolate->unicode_cache(), flat.ToOneByteVector(), radix);
@@ -141,6 +142,7 @@ RUNTIME_FUNCTION(Runtime_StringParseInt) {
 }
 
 
+// ES6 18.2.4 parseFloat(string)
 RUNTIME_FUNCTION(Runtime_StringParseFloat) {
   HandleScope shs(isolate);
   DCHECK(args.length() == 1);