Invalidate all wallpaper cache if display configuration changed

chrome/browser/chromeos/login/wallpaper_manager_unittest.cc

 // Copyright 2013 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 <cstdlib>
 #include <cstring>
 
 #include "ash/ash_resources/grit/ash_resources.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
@@ skipping 168 matching lines @@
   scoped_ptr<WallpaperManager::TestApi> test_api;
   test_api.reset(new WallpaperManager::TestApi(WallpaperManager::Get()));
 
   gfx::ImageSkia test_user_1_wallpaper = CreateTestImage(SK_ColorRED);
   gfx::ImageSkia test_user_2_wallpaper = CreateTestImage(SK_ColorGREEN);
   gfx::ImageSkia test_user_3_wallpaper = CreateTestImage(SK_ColorWHITE);
   test_api->SetWallpaperCache(test_user_1, test_user_1_wallpaper);
   test_api->SetWallpaperCache(test_user_2, test_user_2_wallpaper);
   test_api->SetWallpaperCache(test_user_3, test_user_3_wallpaper);
 
-  test_api->ClearWallpaperCache();
+  test_api->ClearDisposableWallpaperCache();
 
   gfx::ImageSkia cached_wallpaper;
   EXPECT_TRUE(test_api->GetWallpaperFromCache(test_user_1, &cached_wallpaper));
   // Logged in users' wallpaper cache should be kept.
   EXPECT_TRUE(cached_wallpaper.BackedBySameObjectAs(test_user_1_wallpaper));
   EXPECT_TRUE(test_api->GetWallpaperFromCache(test_user_2, &cached_wallpaper));
   EXPECT_TRUE(cached_wallpaper.BackedBySameObjectAs(test_user_2_wallpaper));
 
   // Not logged in user's wallpaper cache should be cleared.
   EXPECT_FALSE(test_api->GetWallpaperFromCache(test_user_3, &cached_wallpaper));
 }
 
 }  // namespace chromeos