Get rid of use of CreateStringValue in chromeos/ directory.

chrome/browser/chromeos/login/wallpaper_manager_browsertest.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/chromeos/login/wallpaper_manager.h"
 
 #include "ash/desktop_background/desktop_background_resources.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_controller_observer.h"
 #include "ash/display/multi_display_manager.h"
@@ skipping 74 matching lines @@
     MessageLoop::current()->Run();
   }
 
   virtual void OnWallpaperDataChanged() OVERRIDE {
     MessageLoop::current()->Quit();
   }
 
   // Sets |username| wallpaper.
   void SetUserWallpaper(const std::string& username) {
     ListPrefUpdate users_pref(local_state_, "LoggedInUsers");
-    users_pref->AppendIfNotPresent(base::Value::CreateStringValue(username));
+    users_pref->AppendIfNotPresent(new base::StringValue(username));
     WallpaperManager::Get()->SetUserWallpaper(username);
   }
 
  protected:
   // Saves bitmap |resource_id| to disk.
   void SaveUserWallpaperData(const std::string& username,
                              const FilePath& wallpaper_path,
                              int resource_id) {
     scoped_refptr<base::RefCountedStaticMemory> image_data(
         ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
@@ skipping 108 matching lines @@
   UpdateDisplay("800x600,2000x2000");
   WaitAsyncWallpaperLoad();
   wallpaper = controller_->GetWallpaper();
 
   // The large resolution custom wallpaper is expected.
   EXPECT_EQ(kExpectedLargeWallpaperWidth, wallpaper.width());
   EXPECT_EQ(kExpectedLargeWallpaperHeight, wallpaper.height());
 }
 
 }  // namepace chromeos