Changed change processors to use ScopedStopObserving

chrome/browser/sync/glue/theme_change_processor.cc

 // Copyright (c) 2011 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/sync/glue/theme_change_processor.h"
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/glue/theme_util.h"
@@ skipping 88 matching lines @@
     sync_api::ReadNode node(trans);
     if (!node.InitByIdLookup(change.id)) {
       error_handler()->OnUnrecoverableError(FROM_HERE,
                                             "Theme node lookup failed.");
       return;
     }
     DCHECK_EQ(node.GetModelType(), syncable::THEMES);
     DCHECK(profile_);
     theme_specifics = node.GetThemeSpecifics();
   }
-  StopObserving();
+  ScopedStopObserving<ThemeChangeProcessor> stop_observing(this);
   SetCurrentThemeFromThemeSpecificsIfNecessary(theme_specifics, profile_);
-  StartObserving();
 }
 
 void ThemeChangeProcessor::StartImpl(Profile* profile) {
   DCHECK(profile);
   profile_ = profile;
   StartObserving();
 }
 
 void ThemeChangeProcessor::StopImpl() {
   StopObserving();
   profile_ = NULL;
 }
 
 void ThemeChangeProcessor::StartObserving() {
   DCHECK(profile_);
   VLOG(1) << "Observing BROWSER_THEME_CHANGED";
   notification_registrar_.Add(
       this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
       content::Source<ThemeService>(
           ThemeServiceFactory::GetForProfile(profile_)));
 }
 
 void ThemeChangeProcessor::StopObserving() {
   DCHECK(profile_);
   VLOG(1) << "Unobserving all notifications";
   notification_registrar_.RemoveAll();
 }
 
 }  // namespace browser_sync