[tracing] Remove MemoryAllocatorDump::process_memory_dump

components/sync/syncable/directory.cc

Index: components/sync/syncable/directory.cc
diff --git a/components/sync/syncable/directory.cc b/components/sync/syncable/directory.cc
index 31cbb8699719a4695bde6e49d2673c2cf55b84cd..ba417e757a4f322bddbcaa6f6e08ebda9df30b1e 100644
--- a/components/sync/syncable/directory.cc
+++ b/components/sync/syncable/directory.cc
@@ -944,8 +944,7 @@ void Directory::OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd) {
   if (store_) {
     std::string dump_name =
         base::StringPrintf("%s/store", dump_name_base.c_str());
-    auto* dump = pmd->CreateAllocatorDump(dump_name);
-    store_->ReportMemoryUsage(dump);
+    store_->ReportMemoryUsage(pmd, dump_name);
   }
 }