revert thread isolate in PreallocatedStorageAllocationPolicy

test/cctest/test-list.cc

Index: test/cctest/test-list.cc
diff --git a/test/cctest/test-list.cc b/test/cctest/test-list.cc
index ca15bf99b6bb42efbcd9d351958176e580bb1e29..a29972b583bb7754cb33b8bcba9580c3620958b7 100644
--- a/test/cctest/test-list.cc
+++ b/test/cctest/test-list.cc
@@ -35,8 +35,6 @@ using namespace v8::internal;
 // Use a testing allocator that clears memory before deletion.
 class ZeroingAllocationPolicy {
  public:
-  typedef ZeroingAllocationPolicy Deleter;
-
   void* New(size_t size) {
     // Stash the size in the first word to use for Delete.
     size_t true_size = size + sizeof(size_t);