Don't sync session.startup_urls and session.urls_to_restore_on_startup to mobile platforms.

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 26 matching lines @@
       pref->urls.push_back(fixed_url);
     }
   }
 }
 
 }  // namespace
 
 // static
 void SessionStartupPref::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterIntegerPref(
-      prefs::kRestoreOnStartup,
-      TypeToPrefValue(GetDefaultStartupType()),
-      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
-  registry->RegisterListPref(prefs::kURLsToRestoreOnStartup,
-                             user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
+#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()),
+                                flags);
+  registry->RegisterListPref(prefs::kURLsToRestoreOnStartup, flags);
 }
 
 // static
 SessionStartupPref::Type SessionStartupPref::GetDefaultStartupType() {
 #if defined(OS_CHROMEOS)
   return SessionStartupPref::LAST;
 #else
   return SessionStartupPref::DEFAULT;
 #endif
 }
@@ skipping 86 matching lines @@
     default:                 return SessionStartupPref::DEFAULT;
   }
 }
 
 SessionStartupPref::SessionStartupPref(Type type) : type(type) {}
 
 SessionStartupPref::SessionStartupPref(const SessionStartupPref& other) =
     default;
 
 SessionStartupPref::~SessionStartupPref() {}