Replace string16 with base::string16.

chrome/browser/background/background_application_list_model.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/background/background_application_list_model.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/sha1.h"
@@ skipping 298 matching lines @@
   // as background apps.
   if (!extension.is_hosted_app())
     return true;
 
   // Hosted apps with manifest-provided background pages are background apps.
   if (extensions::BackgroundInfo::HasBackgroundPage(&extension))
     return true;
 
   BackgroundContentsService* service =
       BackgroundContentsServiceFactory::GetForProfile(profile);
-  string16 app_id = ASCIIToUTF16(extension.id());
+  base::string16 app_id = ASCIIToUTF16(extension.id());
   // If we have an active or registered background contents for this app, then
   // it's a background app. This covers the cases where the app has created its
   // background contents, but it hasn't navigated yet, or the background
   // contents crashed and hasn't yet been restarted - in both cases we still
   // want to treat the app as a background app.
   if (service->GetAppBackgroundContents(app_id) ||
       service->HasRegisteredBackgroundContents(app_id)) {
     return true;
   }
 
@@ skipping 103 matching lines @@
          (*old_cursor)->name() == (*new_cursor)->name() &&
          (*old_cursor)->id() == (*new_cursor)->id()) {
     ++old_cursor;
     ++new_cursor;
   }
   if (old_cursor != extensions_.end() || new_cursor != extensions.end()) {
     extensions_ = extensions;
     FOR_EACH_OBSERVER(Observer, observers_, OnApplicationListChanged(profile_));
   }
 }