Make extensions DSE persistent in browser prefs

chrome/browser/prefs/session_startup_pref.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/prefs/session_startup_pref.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 23 matching lines @@
     std::string url_text;
     if (url_list->GetString(i, &url_text)) {
       GURL fixed_url = url_formatter::FixupURL(url_text, std::string());
       pref->urls.push_back(fixed_url);
     }
   }
 }
 
 }  // namespace
 
+const int SessionStartupPref::kPrefValueLast;
+const int SessionStartupPref::kPrefValueURLs;
+const int SessionStartupPref::kPrefValueNewTab;
+const int SessionStartupPref::kPrefValueMax;
+
 // static
 void SessionStartupPref::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
 #if defined(OS_IOS) || defined(OS_ANDROID)
   uint32_t flags = PrefRegistry::NO_REGISTRATION_FLAGS;
 #else
   uint32_t flags = user_prefs::PrefRegistrySyncable::SYNCABLE_PREF;
 #endif
   registry->RegisterIntegerPref(prefs::kRestoreOnStartup,
                                 TypeToPrefValue(GetDefaultStartupType()),
@@ skipping 98 matching lines @@
     default:                 return SessionStartupPref::DEFAULT;
   }
 }
 
 SessionStartupPref::SessionStartupPref(Type type) : type(type) {}
 
 SessionStartupPref::SessionStartupPref(const SessionStartupPref& other) =
     default;
 
 SessionStartupPref::~SessionStartupPref() {}