Fixed space leak in Interface class.

The exports_ hash map itself should live in the zone, too, not only
its entries.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/156643002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19138 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/interface.cc

@@ -89,9 +89,10 @@ void Interface::DoAdd(
   ZoneHashMap** map = &Chase()->exports_;
   ZoneAllocationPolicy allocator(zone);
 
-  if (*map == NULL)
-    *map = new ZoneHashMap(Match, ZoneHashMap::kDefaultHashMapCapacity,
-                           allocator);
+  if (*map == NULL) {
+    *map = new(zone->New(sizeof(ZoneHashMap)))
+        ZoneHashMap(Match, ZoneHashMap::kDefaultHashMapCapacity, allocator);
+  }
 
   ZoneHashMap::Entry* p = (*map)->Lookup(name, hash, !IsFrozen(), allocator);
   if (p == NULL) {