[tracing] Add names to memory-infra dumpers for debugging

base/trace_event/memory_dump_manager_unittest.cc

Index: base/trace_event/memory_dump_manager_unittest.cc
diff --git a/base/trace_event/memory_dump_manager_unittest.cc b/base/trace_event/memory_dump_manager_unittest.cc
index 42b1b75fa5c0279d3bc70660aa85dc23766c943c..15ae42444d1e0b0510e1c0fb13eb46eea8ee4ea7 100644
--- a/base/trace_event/memory_dump_manager_unittest.cc
+++ b/base/trace_event/memory_dump_manager_unittest.cc
@@ -43,7 +43,7 @@ void RegisterDumpProvider(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) {
   MemoryDumpManager* mdm = MemoryDumpManager::GetInstance();
   mdm->set_dumper_registrations_ignored_for_testing(false);
-  mdm->RegisterDumpProvider(mdp, task_runner);
+  mdm->RegisterDumpProvider(mdp, "TestDumpProvider", task_runner);
   mdm->set_dumper_registrations_ignored_for_testing(true);
 }