Access to Chrome via the System Tray should go through the User Manager.

chrome/browser/profiles/profile_window.h

 // Copyright 2013 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 CHROME_BROWSER_PROFILES_PROFILE_WINDOW_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_WINDOW_H_
 
 #include "base/callback_forward.h"
+#include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/profile_chooser_constants.h"
 #include "chrome/browser/ui/startup/startup_types.h"
 
 class Profile;
 namespace base { class FilePath; }
 
 namespace profiles {
 
-// Callback to be used when switching to a new profile is completed.
-typedef base::Callback<void()> ProfileSwitchingDoneCallback;
-
 // Different tutorials that can be displayed in the user manager.
 enum UserManagerTutorialMode {
   USER_MANAGER_NO_TUTORIAL,        // Does not display a tutorial.
   USER_MANAGER_TUTORIAL_OVERVIEW,  // Basic overview of new features.
   USER_MANAGER_TUTORIAL_LOCK,      // TODO(noms): To be implemented.
 };
 
+// Different actions to perform after the user manager selects a profile.
+enum UserManagerProfileSelected {
+  USER_MANAGER_SELECT_PROFILE_NO_ACTION,
+  USER_MANAGER_SELECT_PROFILE_TASK_MANAGER,
+  USER_MANAGER_SELECT_PROFILE_ABOUT_CHROME,
+};
+
+extern const char kUserManagerSelectProfileTaskManager[];
+extern const char kUserManagerSelectProfileAboutChrome[];
+
 // Activates a window for |profile| on the desktop specified by
 // |desktop_type|. If no such window yet exists, or if |always_create| is
 // true, this first creates a new window, then activates
 // that. If activating an exiting window and multiple windows exists then the
 // window that was most recently active is activated. This is used for
 // creation of a window from the multi-profile dropdown menu.
 void FindOrCreateNewWindowForProfile(
     Profile* profile,
     chrome::startup::IsProcessStartup process_startup,
     chrome::startup::IsFirstRun is_first_run,
     chrome::HostDesktopType desktop_type,
     bool always_create);
 
 // Opens a Browser with the specified profile given by |path|.
 // If |always_create| is true then a new window is created
 // even if a window for that profile already exists. When the browser is
 // opened, |callback| will be run if it isn't null.
 
 void SwitchToProfile(const base::FilePath& path,
                      chrome::HostDesktopType desktop_type,
                      bool always_create,
-                     ProfileSwitchingDoneCallback callback,
+                     ProfileManager::CreateCallback callback,
                      ProfileMetrics::ProfileOpen metric);
 
 // Opens a Browser for the guest profile and runs |callback| if it isn't null.
 void SwitchToGuestProfile(chrome::HostDesktopType desktop_type,
-                          ProfileSwitchingDoneCallback callback);
+                          ProfileManager::CreateCallback callback);
 
 // Creates a new profile from the next available profile directory, and
 // opens a new browser window for the profile once it is ready. When the browser
 // is opened, |callback| will be run if it isn't null.
 void CreateAndSwitchToNewProfile(chrome::HostDesktopType desktop_type,
-                                 ProfileSwitchingDoneCallback callback,
+                                 ProfileManager::CreateCallback callback,
                                  ProfileMetrics::ProfileAdd metric);
 
 // Closes all browser windows that belong to the guest profile.
 void CloseGuestProfileWindows();
 
 // Closes all the browser windows for |profile| and opens the user manager.
 void LockProfile(Profile* profile);
 
 // Creates or reuses the guest profile needed by the user manager. Based on
 // the value of |tutorial_mode|, the user manager can show a specific
 // tutorial, or no tutorial at all. If a tutorial is not shown, then
 // |profile_path_to_focus| could be used to specify which user should be
-// focused. |callback| is run with the custom url to be displayed, as well as
-// a pointer to the guest profile.
+// focused. After a profile is opened from the user manager, perform
+// |profile_open_action|. |callback| is run with the custom url to be displayed,
+// as well as a pointer to the guest profile.
 void CreateGuestProfileForUserManager(
     const base::FilePath& profile_path_to_focus,
     profiles::UserManagerTutorialMode tutorial_mode,
+    profiles::UserManagerProfileSelected profile_open_action,
     const base::Callback<void(Profile*, const std::string&)>& callback);
 
 // Based on the |profile| preferences, determines whether a user manager
 // tutorial needs to be shown, and displays the user manager with or without
 // the tutorial.
 void ShowUserManagerMaybeWithTutorial(Profile* profile);
 
 // Enables new profile management preview and shows the user manager tutorial.
 void EnableNewProfileManagementPreview(Profile* profile);
 
 // Disables new profile management preview and attempts to relaunch Chrome.
 void DisableNewProfileManagementPreview(Profile* profile);
 
 // Converts from modes in the avatar menu to modes understood by
 // ProfileChooserView.
 void BubbleViewModeFromAvatarBubbleMode(
     BrowserWindow::AvatarBubbleMode mode,
     BubbleViewMode* bubble_view_mode,
     TutorialMode* tutorial_mode);
 
 }  // namespace profiles
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_WINDOW_H_