Revert of Don't use barcodes in ProtocolPerfTests

remoting/host/chromoting_host.h

Index: remoting/host/chromoting_host.h
diff --git a/remoting/host/chromoting_host.h b/remoting/host/chromoting_host.h
index 01a6d1715d8b0dc371e9523d62c023413129d971..5186988f0b9eda0052080b9df28fe84248b003e5 100644
--- a/remoting/host/chromoting_host.h
+++ b/remoting/host/chromoting_host.h
@@ -5,9 +5,9 @@
 #ifndef REMOTING_HOST_CHROMOTING_HOST_H_
 #define REMOTING_HOST_CHROMOTING_HOST_H_
 
+#include <list>
 #include <memory>
 #include <string>
-#include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -66,8 +66,6 @@
                        public ClientSession::EventHandler,
                        public HostStatusMonitor {
  public:
-  typedef std::vector<std::unique_ptr<ClientSession>> ClientSessions;
-
   // |desktop_environment_factory| must outlive this object.
   ChromotingHost(
       DesktopEnvironmentFactory* desktop_environment_factory,
@@ -135,8 +133,6 @@
     pairing_registry_ = pairing_registry;
   }
 
-  const ClientSessions& client_sessions_for_tests() { return clients_; }
-
   base::WeakPtr<ChromotingHost> AsWeakPtr() {
     return weak_factory_.GetWeakPtr();
   }
@@ -144,6 +140,7 @@
  private:
   friend class ChromotingHostTest;
 
+  typedef std::list<ClientSession*> ClientList;
   typedef ScopedVector<HostExtension> HostExtensionList;
 
   // Immediately disconnects all active clients. Host-internal components may
@@ -165,7 +162,7 @@
   base::ObserverList<HostStatusObserver> status_observers_;
 
   // The connections to remote clients.
-  ClientSessions clients_;
+  ClientList clients_;
 
   // True if the host has been started.
   bool started_;