Provide baseline for experimental GC implementation.

src/spaces.cc

Index: src/spaces.cc
diff --git a/src/spaces.cc b/src/spaces.cc
index cdc682f879bf5e9bce8b9bf173ab32485f89b70b..9e5b1f3c718bfd26b8b862fb089c46721414b350 100644
--- a/src/spaces.cc
+++ b/src/spaces.cc
@@ -2781,20 +2781,6 @@ void FixedSpace::ReportStatistics() {
 void MapSpace::PrepareForMarkCompact(bool will_compact) {
   // Call prepare of the super class.
   FixedSpace::PrepareForMarkCompact(will_compact);
-
-  if (will_compact) {
-    // Initialize map index entry.
-    int page_count = 0;
-    PageIterator it(this, PageIterator::ALL_PAGES);
-    while (it.has_next()) {
-      ASSERT_MAP_PAGE_INDEX(page_count);
-
-      Page* p = it.next();
-      ASSERT(p->mc_page_index == page_count);
-
-      page_addresses_[page_count++] = p->address();
-    }
-  }
 }