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

chrome/browser/ui/views/profiles/user_manager_view.cc

Index: chrome/browser/ui/views/profiles/user_manager_view.cc
diff --git a/chrome/browser/ui/views/profiles/user_manager_view.cc b/chrome/browser/ui/views/profiles/user_manager_view.cc
index 8f6a80ccd6a377c090e9a8801e9cf60eeee93d11..2e0a2cdae022b64f0ae71330bb0926f9cf382d6c 100644
--- a/chrome/browser/ui/views/profiles/user_manager_view.cc
+++ b/chrome/browser/ui/views/profiles/user_manager_view.cc
@@ -42,12 +42,27 @@ namespace chrome {
 
 // Declared in browser_dialogs.h so others don't have to depend on this header.
 void ShowUserManager(const base::FilePath& profile_path_to_focus) {
-  UserManagerView::Show(
-      profile_path_to_focus, profiles::USER_MANAGER_NO_TUTORIAL);
+  UserManagerView::Show(profile_path_to_focus,
+                        profiles::USER_MANAGER_NO_TUTORIAL,
+                        profiles::USER_MANAGER_SELECT_PROFILE_NO_ACTION);
 }
 
 void ShowUserManagerWithTutorial(profiles::UserManagerTutorialMode tutorial) {
-  UserManagerView::Show(base::FilePath(), tutorial);
+  UserManagerView::Show(base::FilePath(),
+                        tutorial,
+                        profiles::USER_MANAGER_SELECT_PROFILE_NO_ACTION);
+}
+
+void ShowUserManagerThenTaskManager() {
+  UserManagerView::Show(base::FilePath(),
+                        profiles::USER_MANAGER_NO_TUTORIAL,
+                        profiles::USER_MANAGER_SELECT_PROFILE_TASK_MANAGER);
+}
+
+void ShowUserManagerThenAboutChrome() {
+  UserManagerView::Show(base::FilePath(),
+                        profiles::USER_MANAGER_NO_TUTORIAL,
+                        profiles::USER_MANAGER_SELECT_PROFILE_ABOUT_CHROME);
 }
 
 void HideUserManager() {
@@ -68,8 +83,10 @@ UserManagerView::~UserManagerView() {
 }
 
 // static
-void UserManagerView::Show(const base::FilePath& profile_path_to_focus,
-                           profiles::UserManagerTutorialMode tutorial_mode) {
+void UserManagerView::Show(
+    const base::FilePath& profile_path_to_focus,
+    profiles::UserManagerTutorialMode tutorial_mode,
+    profiles::UserManagerProfileSelected profile_open_action) {
   ProfileMetrics::LogProfileSwitchUser(ProfileMetrics::OPEN_USER_MANAGER);
   if (instance_) {
     // If there's a user manager window open already, just activate it.
@@ -82,6 +99,7 @@ void UserManagerView::Show(const base::FilePath& profile_path_to_focus,
   profiles::CreateGuestProfileForUserManager(
       profile_path_to_focus,
       tutorial_mode,
+      profile_open_action,
       base::Bind(&UserManagerView::OnGuestProfileCreated,
                  base::Passed(make_scoped_ptr(new UserManagerView)),
                  profile_path_to_focus));