Remove most occurences of PrefRegistrySyncable::UNSYNCABLE_PREF

chrome/browser/extensions/api/tabs/tabs_api.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/extensions/api/tabs/tabs_api.h"
 
 #include <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 1615 matching lines @@
       reason_description = "view is invisible";
       break;
   }
   error_ = ErrorUtils::FormatErrorMessage("Failed to capture tab: *",
                                           reason_description);
   SendResponse(false);
 }
 
 void TabsCaptureVisibleTabFunction::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterBooleanPref(
-      prefs::kDisableScreenshots,
-      false,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kDisableScreenshots, false);
 }
 
 bool TabsDetectLanguageFunction::RunAsync() {
   scoped_ptr<tabs::DetectLanguage::Params> params(
       tabs::DetectLanguage::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
   int tab_id = 0;
   Browser* browser = NULL;
   WebContents* contents = NULL;
@@ skipping 355 matching lines @@
   ZoomModeToZoomSettings(zoom_mode, &zoom_settings);
   zoom_settings.default_zoom_factor.reset(new double(
       content::ZoomLevelToZoomFactor(zoom_controller->GetDefaultZoomLevel())));
 
   results_ = api::tabs::GetZoomSettings::Results::Create(zoom_settings);
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions