Do not show pinned tabs on multiple instances

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 74 matching lines @@
       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.
   static StartupTabs CheckResetTriggerTabPolicy(bool profile_has_trigger);
 
   // Determines whether the startup preference requires the contents of
   // |pinned_tabs| to be shown. This is needed to avoid duplicates, as the
   // session restore logic will also resurface pinned tabs on its own.
-  static StartupTabs CheckPinnedTabPolicy(const SessionStartupPref& pref,
-                                          const StartupTabs& pinned_tabs);
+  static StartupTabs CheckPinnedTabPolicy(
+      const SessionStartupPref& pref,
+      const StartupTabs& pinned_tabs,
+      bool profile_has_other_tabbed_browser);
 
   // Determines whether preferences and window state indicate that
   // user-specified tabs should be shown as the default new window content, and
   // returns the specified tabs if so.
   static StartupTabs CheckPreferencesTabPolicy(
       const SessionStartupPref& pref,
       bool profile_has_other_tabbed_browser);
 
   // Determines whether startup preferences require the New Tab Page to be
   // explicitly specified. Session Restore does not expect the NTP to be passed.
@@ skipping 26 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_