Adding check to ensure onboarding content is not shown to supervised users.

chrome/browser/ui/startup/startup_tab_provider.h

 // Copyright 2016 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_UI_STARTUP_STARTUP_TAB_PROVIDER_H_
 #define CHROME_BROWSER_UI_STARTUP_STARTUP_TAB_PROVIDER_H_
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
@@ skipping 45 matching lines @@
 
   // The static Check*TabPolicy methods below enforce the policies relevant to
   // the respective Get*Tabs methods, but do not gather or interact with any
   // system state relating to making those policy decisions.
 
   // Determines which tabs should be shown according to onboarding/first
   // run policy.
   static StartupTabs CheckStandardOnboardingTabPolicy(
       bool is_first_run,
       bool has_seen_welcome_page,
-      bool is_signed_in);
+      bool is_signed_in,
+      bool is_supervised_user);

[Peter Kasting, 2017/01/12 18:28:19]

Random muse: It seems like there are now a number of places in the startup code
that pass a bunch of bools around.  I wonder if any of these would read more
clearly (and safely) at callers/test sites if they used enums, or passed a
struct with named members, or something.

 
 #if defined(OS_WIN)
   // Determines which tabs should be shown according to onboarding/first run
   // policy, including promo content specific to Windows 10.
   static StartupTabs CheckWin10OnboardingTabPolicy(
       bool is_first_run,
       bool has_seen_welcome_page,
       bool has_seen_win10_promo,
       bool is_signed_in,
       bool set_default_browser_allowed,
-      bool is_default_browser);
+      bool is_default_browser,
+      bool is_supervised_user);
 #endif
 
   // Processes first run URLs specified in Master Preferences file, replacing
   // any "magic word" URL hosts with appropriate URLs.
   static StartupTabs CheckMasterPrefsTabPolicy(
       bool is_first_run,
       const std::vector<GURL>& first_run_tabs);
 
   // Determines which tabs should be shown as a result of the presence/absence
   // of a Reset Trigger on this profile.
@@ skipping 43 matching lines @@
   StartupTabs GetPreferencesTabs(const base::CommandLine& command_line,
                                  Profile* profile) const override;
   StartupTabs GetNewTabPageTabs(const base::CommandLine& command_line,
                                 Profile* profile) const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StartupTabProviderImpl);
 };
 
 #endif  // CHROME_BROWSER_UI_STARTUP_STARTUP_TAB_PROVIDER_H_