Document memory coordinator

base/memory/memory_coordinator_client_registry.cc

Index: base/memory/memory_coordinator_client_registry.cc
diff --git a/base/memory/memory_coordinator_client_registry.cc b/base/memory/memory_coordinator_client_registry.cc
index 59cd8ac135e57451b5c0d613de597879468e39fb..57eedc683c38cc31107fb530b86cc5a62826b037 100644
--- a/base/memory/memory_coordinator_client_registry.cc
+++ b/base/memory/memory_coordinator_client_registry.cc
@@ -29,4 +29,9 @@ void MemoryCoordinatorClientRegistry::Unregister(
   clients_->RemoveObserver(client);
 }
 
+void MemoryCoordinatorClientRegistry::Notify(MemoryState state) {
+  clients_->Notify(FROM_HERE,
+                   &base::MemoryCoordinatorClient::OnMemoryStateChange, state);
+}
+
 }  // namespace base