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

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

 // 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.
 
 #include "chrome/browser/ui/views/profiles/user_manager_view.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profile_metrics.h"
@@ skipping 24 matching lines @@
 // Default window size.
 const int kWindowWidth = 900;
 const int kWindowHeight = 700;
 
 }
 
 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() {
   UserManagerView::Hide();
 }
 
 }  // namespace chrome
 
 // static
 UserManagerView* UserManagerView::instance_ = NULL;
 
 UserManagerView::UserManagerView()
     : web_view_(NULL),
       keep_alive_(new AutoKeepAlive(NULL)) {
 }
 
 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.
     instance_->GetWidget()->Activate();
     return;
   }
 
   // Create the guest profile, if necessary, and open the user manager
   // from the guest profile.
   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));
 }
 
 // static
 void UserManagerView::Hide() {
   if (instance_)
     instance_->GetWidget()->Close();
 }
@@ skipping 103 matching lines @@
   // Now that the window is closed, we can allow a new one to be opened.
   // (WindowClosing comes in asynchronously from the call to Close() and we
   // may have already opened a new instance).
   if (instance_ == this)
     instance_ = NULL;
 }
 
 bool UserManagerView::UseNewStyleForThisDialog() const {
   return false;
 }