RFC: Try to be much more careful with where we skip the write barrier by:...

src/dateparser.cc

Index: src/dateparser.cc
===================================================================
--- src/dateparser.cc	(revision 3737)
+++ src/dateparser.cc	(working copy)
@@ -72,15 +72,9 @@
 
   if (!Smi::IsValid(year) || !IsMonth(month) || !IsDay(day)) return false;
 
-  output->set(YEAR,
-              Smi::FromInt(year),
-              SKIP_WRITE_BARRIER);
-  output->set(MONTH,
-              Smi::FromInt(month - 1),
-              SKIP_WRITE_BARRIER);  // 0-based
-  output->set(DAY,
-              Smi::FromInt(day),
-              SKIP_WRITE_BARRIER);
+  output->set(YEAR, Smi::FromInt(year));
+  output->set(MONTH, Smi::FromInt(month - 1));  // 0-based
+  output->set(DAY, Smi::FromInt(day));
   return true;
 }
 
@@ -103,15 +97,9 @@
 
   if (!IsHour(hour) || !IsMinute(minute) || !IsSecond(second)) return false;
 
-  output->set(HOUR,
-              Smi::FromInt(hour),
-              SKIP_WRITE_BARRIER);
-  output->set(MINUTE,
-              Smi::FromInt(minute),
-              SKIP_WRITE_BARRIER);
-  output->set(SECOND,
-              Smi::FromInt(second),
-              SKIP_WRITE_BARRIER);
+  output->set(HOUR, Smi::FromInt(hour));
+  output->set(MINUTE, Smi::FromInt(minute));
+  output->set(SECOND, Smi::FromInt(second));
   return true;
 }
 
@@ -121,13 +109,9 @@
     if (minute_ == kNone) minute_ = 0;
     int total_seconds = sign_ * (hour_ * 3600 + minute_ * 60);
     if (!Smi::IsValid(total_seconds)) return false;
-    output->set(UTC_OFFSET,
-                Smi::FromInt(total_seconds),
-                SKIP_WRITE_BARRIER);
+    output->set(UTC_OFFSET, Smi::FromInt(total_seconds));
   } else {
-    output->set(UTC_OFFSET,
-                Heap::null_value(),
-                SKIP_WRITE_BARRIER);
+    output->set_null(UTC_OFFSET);
   }
   return true;
 }