Make cc::SoftwareImageDecodeController, cc::ResourcePool, and cc::StagingBufferPoo…

components/memory_coordinator/common/client_registry.cc

Index: components/memory_coordinator/common/client_registry.cc
diff --git a/components/memory_coordinator/common/client_registry.cc b/components/memory_coordinator/common/client_registry.cc
index 57866c880d774fbfccf2638c484d3d64e3209989..9d5bbb4bf0cefe2704f2c401ec19b89b42974b20 100644
--- a/components/memory_coordinator/common/client_registry.cc
+++ b/components/memory_coordinator/common/client_registry.cc
@@ -6,6 +6,8 @@
 
 namespace memory_coordinator {
 
+ClientRegistry* ClientRegistry::instance_ = nullptr;
+
 ClientRegistry::ClientRegistry() : clients_(new ClientList) {}
 
 ClientRegistry::~ClientRegistry() {}
@@ -18,4 +20,12 @@ void ClientRegistry::UnregisterClient(MemoryCoordinatorClient* client) {
   clients_->RemoveObserver(client);
 }
 
+ClientRegistry* ClientRegistry::GetInstance() {
+  return instance_;
+}
+
+void ClientRegistry::SetInstance(ClientRegistry* instance) {
+  instance_ = instance;
+}
+
 }  // namespace memory_coordinator