Reland "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 58f808bbc9786f47a4f49b33e0d315ec02f6044f..0bd9497b851793f99257b9a2a2faffbb8a360521 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"},