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

chrome/browser/profiles/profile_window.h

Index: chrome/browser/profiles/profile_window.h
diff --git a/chrome/browser/profiles/profile_window.h b/chrome/browser/profiles/profile_window.h
index 033357c28a1c774b39b80612d0a05a0143967515..841ec08984757a646d846f95f4e36321bbb7250e 100644
--- a/chrome/browser/profiles/profile_window.h
+++ b/chrome/browser/profiles/profile_window.h
@@ -6,6 +6,7 @@
 #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"
@@ -17,9 +18,6 @@ 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.
@@ -27,6 +25,16 @@ enum UserManagerTutorialMode {
   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
@@ -48,18 +56,18 @@ void FindOrCreateNewWindowForProfile(
 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.
@@ -72,11 +80,13 @@ void LockProfile(Profile* profile);
 // 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