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..c19275b7440a61b5da6a048e9d368f916612c4e0 100644
--- a/components/memory_coordinator/child/child_memory_coordinator_impl.h
+++ b/components/memory_coordinator/child/child_memory_coordinator_impl.h
@@ -5,6 +5,8 @@
 #ifndef COMPONENTS_MEMORY_COORDINATOR_CHILD_CHILD_MEMORY_COORDINATOR_IMPL_H_
 #define COMPONENTS_MEMORY_COORDINATOR_CHILD_CHILD_MEMORY_COORDINATOR_IMPL_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/observer_list_threadsafe.h"
 #include "components/memory_coordinator/common/memory_coordinator_client.h"
@@ -13,6 +15,8 @@
 
 namespace memory_coordinator {
 
+class BlinkMemoryCoordinatorClient;
+
 // ChildMemoryCoordinatorImpl is the implementation of ChildMemoryCoordinator.
 // It lives in child processes and is responsible for dispatching memory events
 // to its clients.
@@ -25,12 +29,19 @@ 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 GetLastState(const GetLastStateCallback& callback) override;
 
  private:
   mojo::StrongBinding<mojom::ChildMemoryCoordinator> binding_;
   scoped_refptr<ClientList> clients_;
+  mojom::MemoryState state_ = mojom::MemoryState::UNKNOWN;
+
+  std::unique_ptr<BlinkMemoryCoordinatorClient> blink_client_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildMemoryCoordinatorImpl);
 };