Change userid from a uint32_t to a string guid

mojo/shell/identity.h

 // Copyright 2015 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_IDENTITY_H_
 #define MOJO_SHELL_IDENTITY_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <set>
 #include <string>
 
 namespace mojo {
 namespace shell {
 
 // A set of names of interfaces that may be exposed to an application.
 using AllowedInterfaces = std::set<std::string>;
 // A map of allowed applications to allowed interface sets. See shell.mojom for
 // more details.
 using CapabilityFilter = std::map<std::string, AllowedInterfaces>;
 
-
 // Represents the identity of an application.
 // |name| is the structured name of the application.
 // |qualifier| is a string that allows to tie a specific instance of an
 // application to another. A typical use case of qualifier is to control process
 // grouping for a given application name. For example, the core services are
 // grouped into "Core"/"Files"/"Network"/etc. using qualifier; content handler's
 // qualifier is derived from the origin of the content.
 class Identity {
  public:
   Identity();
-  // Assumes user = mojom::Connector::kUserRoot.
+  // Assumes user = mojom::kRootUserID.
   // Used in tests or for shell-initiated connections.
   explicit Identity(const std::string& in_name);
   Identity(const std::string& in_name,
            const std::string& in_qualifier,
-           uint32_t user_id);
+           const std::string& user_id);
   Identity(const Identity& other);
   ~Identity();
 
   bool operator<(const Identity& other) const;
   bool is_null() const { return name_.empty(); }
   bool operator==(const Identity& other) const;
 
   const std::string& name() const { return name_; }
-  uint32_t user_id() const { return user_id_; }
-  void set_user_id(uint32_t user_id) { user_id_ = user_id; }
+  const std::string& user_id() const { return user_id_; }
+  void set_user_id(const std::string& user_id) { user_id_ = user_id; }
   const std::string& qualifier() const { return qualifier_; }
   void set_filter(const CapabilityFilter& filter) { filter_ = filter; }
   const CapabilityFilter& filter() const { return filter_; }
 
  private:
   std::string name_;
   std::string qualifier_;
 
-  uint32_t user_id_;
+  std::string user_id_;
 
   // TODO(beng): CapabilityFilter is not currently included in equivalence
   //             checks for Identity since we're not currently clear on the
   //             policy for instance disambiguation. Need to figure this out.
   //             This field is supplied because it is logically part of the
   //             instance identity of an application.
   CapabilityFilter filter_;
 };
 
 // Creates an identity for the Shell, used when the Shell connects to
 // applications.
 Identity CreateShellIdentity();
 
 // Returns a capability filter that allows an application to connect to any
 // other application and any service exposed by other applications.
 CapabilityFilter GetPermissiveCapabilityFilter();
 
 // Returns the set of interfaces that an application instance with |filter| is
 // allowed to see from an instance with |identity|.
 AllowedInterfaces GetAllowedInterfaces(const CapabilityFilter& filter,
                                        const Identity& identity);
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_IDENTITY_H_