Remove migration of obsolete value for "session.restore_on_startup".

chrome/browser/ui/startup/startup_browser_creator_impl.cc

 // Copyright (c) 2012 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/startup/startup_browser_creator_impl.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "apps/app_restore_service.h"
@@ skipping 666 matching lines @@
     UrlsToTabs(urls, &tabs);
   } else if (pref.type == SessionStartupPref::URLS && !pref.urls.empty() &&
              !HasPendingUncleanExit(profile_)) {
     // Optionally include the welcome page first.
     if (welcome_run_type_ == WelcomeRunType::FIRST_TAB)
       UrlsToTabs(std::vector<GURL>(1, internals::GetWelcomePageURL()), &tabs);
     // Only use the set of urls specified in preferences if nothing was
     // specified on the command line. Filter out any urls that are to be
     // restored by virtue of having been previously pinned.
     AddUniqueURLs(pref.urls, &tabs);
-  } else if (pref.type == SessionStartupPref::HOMEPAGE) {
-    // If 'homepage' selected, either by the user or by a policy, we should
-    // have migrated them to another value.
-    NOTREACHED() << "SessionStartupPref has deprecated type HOMEPAGE";
   }
 
   if (tabs.empty())
     return NULL;
 
   Browser* browser = OpenTabsInBrowser(NULL, true, tabs, desktop_type);
   return browser;
 }
 
 void StartupBrowserCreatorImpl::AddUniqueURLs(const std::vector<GURL>& urls,
@@ skipping 271 matching lines @@
 #endif  // !OS_WIN
 }
 
 void StartupBrowserCreatorImpl::RecordRapporOnStartupURLs(
     const std::vector<GURL>& urls_to_open) {
   for (const GURL& url : urls_to_open) {
     rappor::SampleDomainAndRegistryFromGURL(g_browser_process->rappor_service(),
                                             "Startup.BrowserLaunchURL", url);
   }
 }