Add MemoryCoordinator

components/memory_coordinator/child/child_memory_coordinator_impl.h

Index: components/memory_coordinator/child/child_memory_coordinator_impl.h
diff --git a/components/memory_coordinator/child/child_memory_coordinator_impl.h b/components/memory_coordinator/child/child_memory_coordinator_impl.h
index bdb6376a6942687f54cc3b72f7118ccf9a971cb3..d3a2f7c4ff60d75f6fbf669924ced9ea61c8a0e5 100644
--- a/components/memory_coordinator/child/child_memory_coordinator_impl.h
+++ b/components/memory_coordinator/child/child_memory_coordinator_impl.h
@@ -8,6 +8,7 @@
 #include "base/compiler_specific.h"
 #include "base/observer_list_threadsafe.h"
 #include "components/memory_coordinator/common/memory_coordinator_client.h"
+#include "components/memory_coordinator/common/memory_coordinator_features.h"
 #include "components/memory_coordinator/public/interfaces/child_memory_coordinator.mojom.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
@@ -25,12 +26,17 @@ class ChildMemoryCoordinatorImpl
       scoped_refptr<ClientList> clients);
   ~ChildMemoryCoordinatorImpl() override;
 
+  static void Create(
+      mojo::InterfaceRequest<mojom::ChildMemoryCoordinator> request);
+
   // mojom::ChildMemoryCoordinator implementations:
   void OnStateChange(mojom::MemoryState state) override;
+  void GetCurrentState(const GetCurrentStateCallback& callback) override;
 
  private:
   mojo::StrongBinding<mojom::ChildMemoryCoordinator> binding_;
   scoped_refptr<ClientList> clients_;
+  mojom::MemoryState state_ = mojom::MemoryState::UNKNOWN;
 
   DISALLOW_COPY_AND_ASSIGN(ChildMemoryCoordinatorImpl);
 };