Document memory coordinator

content/child/memory/child_memory_coordinator_impl.cc

Index: content/child/memory/child_memory_coordinator_impl.cc
diff --git a/content/child/memory/child_memory_coordinator_impl.cc b/content/child/memory/child_memory_coordinator_impl.cc
index 61f9b9db7225d0f78eba894cd2182ba83c749e7b..5412c6458efa83a116c6b8204f4d98fb74deab56 100644
--- a/content/child/memory/child_memory_coordinator_impl.cc
+++ b/content/child/memory/child_memory_coordinator_impl.cc
@@ -58,8 +58,7 @@ ChildMemoryCoordinatorImpl::~ChildMemoryCoordinatorImpl() {
 
 void ChildMemoryCoordinatorImpl::OnStateChange(mojom::MemoryState state) {
   base::MemoryState base_state = ToBaseMemoryState(state);
-  base::MemoryCoordinatorClientRegistry::GetInstance()->clients()->Notify(
-      FROM_HERE, &base::MemoryCoordinatorClient::OnMemoryStateChange,
+  base::MemoryCoordinatorClientRegistry::GetInstance()->Notify(
       base_state);
 }