Add MemoryCoordinator

components/memory_coordinator/child/child_memory_coordinator_impl.cc

Index: components/memory_coordinator/child/child_memory_coordinator_impl.cc
diff --git a/components/memory_coordinator/child/child_memory_coordinator_impl.cc b/components/memory_coordinator/child/child_memory_coordinator_impl.cc
index 75889ed43f66e6463c0e9b3dc0ed578ca745b85b..6a8fc57cf1b67a4e9b6a308dbea627f227d018b3 100644
--- a/components/memory_coordinator/child/child_memory_coordinator_impl.cc
+++ b/components/memory_coordinator/child/child_memory_coordinator_impl.cc
@@ -4,19 +4,39 @@
 
 #include "components/memory_coordinator/child/child_memory_coordinator_impl.h"
 
+#include "components/memory_coordinator/public/interfaces/memory_coordinator.mojom.h"
+
 namespace memory_coordinator {
 
-ChildMemoryCoordinatorImpl::ChildMemoryCoordinatorImpl(
-      mojo::InterfaceRequest<mojom::ChildMemoryCoordinator> request,
-      scoped_refptr<ClientList> clients)
-    : binding_(this, std::move(request)),
-      clients_(clients) {}
+ChildMemoryCoordinatorImpl::ChildMemoryCoordinatorImpl()
+    : binding_(this), clients_(new ClientList) {}
 
 ChildMemoryCoordinatorImpl::~ChildMemoryCoordinatorImpl() {}
 
+void ChildMemoryCoordinatorImpl::Bind(
+    mojom::ChildMemoryCoordinatorRequest request) {
+  binding_.Bind(std::move(request));
+}
+
+void ChildMemoryCoordinatorImpl::RegisterClient(
+    MemoryCoordinatorClient* client) {
+  clients_->AddObserver(client);
+}
+
+void ChildMemoryCoordinatorImpl::UnregisterClient(
+    MemoryCoordinatorClient* client) {
+  clients_->RemoveObserver(client);
+}
+
 void ChildMemoryCoordinatorImpl::OnStateChange(mojom::MemoryState state) {
+  state_ = state;
   clients_->Notify(FROM_HERE, &MemoryCoordinatorClient::OnMemoryStateChange,
                    state);
 }
 
+void ChildMemoryCoordinatorImpl::GetCurrentState(
+    const GetCurrentStateCallback& callback) {
+  callback.Run(state_);
+}
+
 }  // namespace memory_coordinator