Split an allocation policy into an allocator and a deallocator.

src/string-stream.cc

Index: src/string-stream.cc
diff --git a/src/string-stream.cc b/src/string-stream.cc
index 35f7be5416019770a72505bbc3acf1aa071d422b..d8b8ed45c055ec27f6a06f454d5a8e12ec327a91 100644
--- a/src/string-stream.cc
+++ b/src/string-stream.cc
@@ -291,7 +291,7 @@ void StringStream::ClearMentionedObjectCache() {
   isolate->set_string_stream_current_security_token(NULL);
   if (isolate->string_stream_debug_object_cache() == NULL) {
     isolate->set_string_stream_debug_object_cache(
-        new List<HeapObject*, PreallocatedStorage>(0));
+        new List<HeapObject*, PreallocatedStorageAllocationPolicy>(0));
   }
   isolate->string_stream_debug_object_cache()->Clear();
 }