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

gpu/command_buffer/service/buffer_manager.cc

Index: gpu/command_buffer/service/buffer_manager.cc
diff --git a/gpu/command_buffer/service/buffer_manager.cc b/gpu/command_buffer/service/buffer_manager.cc
index 20806e2c8fc691deb331ccd57907c05f1c0caead..50b03b5063c528e3ad363f72da2356fe296c63b5 100644
--- a/gpu/command_buffer/service/buffer_manager.cc
+++ b/gpu/command_buffer/service/buffer_manager.cc
@@ -40,7 +40,7 @@ BufferManager::BufferManager(MemoryTracker* memory_tracker,
   // so don't register a dump provider.
   if (memory_tracker_) {
     base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
-        this, base::ThreadTaskRunnerHandle::Get());
+        this, "gpu::BufferManager", base::ThreadTaskRunnerHandle::Get());
   }
 }