Change userid from a uint32_t to a string guid

mojo/shell/public/cpp/lib/connection_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SHELL_PUBLIC_CPP_LIB_CONNECTION_IMPL_H_
 #define MOJO_SHELL_PUBLIC_CPP_LIB_CONNECTION_IMPL_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 12 matching lines @@
 // other.
 class ConnectionImpl : public Connection {
  public:
   ConnectionImpl();
   // |allowed_interfaces| are the set of interfaces that the shell has allowed
   // an application to expose to another application. If this set contains only
   // the string value "*" all interfaces may be exposed.
   ConnectionImpl(const std::string& connection_name,
                  const std::string& remote_name,
                  uint32_t remote_id,
-                 uint32_t remote_user_id,
+                 const std::string& remote_user_id,
                  shell::mojom::InterfaceProviderPtr remote_interfaces,
                  shell::mojom::InterfaceProviderRequest local_interfaces,
                  const std::set<std::string>& allowed_interfaces);
   ~ConnectionImpl() override;
 
   shell::mojom::Connector::ConnectCallback GetConnectCallback();
 
  private:
   // Connection:
   const std::string& GetConnectionName() override;
   const std::string& GetRemoteApplicationName() override;
-  uint32_t GetRemoteUserID() const override;
+  const std::string& GetRemoteUserID() const override;
   void SetRemoteInterfaceProviderConnectionErrorHandler(
       const Closure& handler) override;
   bool GetRemoteApplicationID(uint32_t* remote_id) const override;
   void AddRemoteIDCallback(const Closure& callback) override;
   bool AllowsInterface(const std::string& interface_name) const override;
   shell::mojom::InterfaceProvider* GetRemoteInterfaces() override;
   InterfaceRegistry* GetLocalRegistry() override;
   base::WeakPtr<Connection> GetWeakPtr() override;
 
-  void OnGotInstanceID(uint32_t target_application_id,
-                       uint32_t target_user_id);
+  void OnGotInstanceID(const std::string& target_user_id,
+                       uint32_t target_application_id);
 
   const std::string connection_name_;
   const std::string remote_name_;
 
   uint32_t remote_id_;
   bool remote_ids_valid_;
   std::vector<Closure> remote_id_callbacks_;
-  uint32_t remote_user_id_;
+  std::string remote_user_id_;
 
   InterfaceRegistry local_registry_;
   shell::mojom::InterfaceProviderPtr remote_interfaces_;
 
   const std::set<std::string> allowed_interfaces_;
   const bool allow_all_interfaces_;
 
   base::WeakPtrFactory<ConnectionImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectionImpl);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_PUBLIC_CPP_LIB_CONNECTION_IMPL_H_