Merge old data and pointer space.

src/extensions/statistics-extension.cc

Index: src/extensions/statistics-extension.cc
diff --git a/src/extensions/statistics-extension.cc b/src/extensions/statistics-extension.cc
index 2c1f91d399381da6b6b4b474ebe8e384a28e5f41..7fdae42fb7773ef40e1ae4fb7b6904d1ad8ba7c7 100644
--- a/src/extensions/statistics-extension.cc
+++ b/src/extensions/statistics-extension.cc
@@ -108,15 +108,9 @@ void StatisticsExtension::GetCounters(
       {heap->new_space()->Size(), "new_space_live_bytes"},
       {heap->new_space()->Available(), "new_space_available_bytes"},
       {heap->new_space()->CommittedMemory(), "new_space_commited_bytes"},
-      {heap->old_pointer_space()->Size(), "old_pointer_space_live_bytes"},
-      {heap->old_pointer_space()->Available(),
-       "old_pointer_space_available_bytes"},
-      {heap->old_pointer_space()->CommittedMemory(),
-       "old_pointer_space_commited_bytes"},
-      {heap->old_data_space()->Size(), "old_data_space_live_bytes"},
-      {heap->old_data_space()->Available(), "old_data_space_available_bytes"},
-      {heap->old_data_space()->CommittedMemory(),
-       "old_data_space_commited_bytes"},
+      {heap->old_space()->Size(), "old_space_live_bytes"},
+      {heap->old_space()->Available(), "old_space_available_bytes"},
+      {heap->old_space()->CommittedMemory(), "old_space_commited_bytes"},
       {heap->code_space()->Size(), "code_space_live_bytes"},
       {heap->code_space()->Available(), "code_space_available_bytes"},
       {heap->code_space()->CommittedMemory(), "code_space_commited_bytes"},