Unpack theme data from extensions off of UI thread.

chrome/browser/extensions/extension_service_sync_unittest.cc

 // Copyright 2015 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 <stddef.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/test/mock_entropy_provider.h"
 #include "base/test/scoped_feature_list.h"
+#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/webstore_private/webstore_private_api.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_service_test_with_install.h"
 #include "chrome/browser/extensions/extension_sync_data.h"
 #include "chrome/browser/extensions/extension_sync_service.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/scripting_permissions_modifier.h"
 #include "chrome/browser/extensions/updater/extension_updater.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
+#include "chrome/browser/themes/theme_service.h"
+#include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/sync_helper.h"
 #include "chrome/common/features.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/crx_file/id_util.h"
 #include "components/sync/model/fake_sync_change_processor.h"
 #include "components/sync/model/sync_change_processor_wrapper_for_test.h"
 #include "components/sync/model/sync_data.h"
@@ skipping 1515 matching lines @@
 
   // Sanity check: Installing an extension should result in a sync change.
   InstallCRX(data_dir().AppendASCII("good.crx"), INSTALL_NEW);
   EXPECT_EQ(1u, processor->changes().size());
 
   processor->changes().clear();
 
   // Installing a theme should not result in a sync change (themes are handled
   // separately by ThemeSyncableService).
   InstallCRX(data_dir().AppendASCII("theme.crx"), INSTALL_NEW);
+  content::WindowedNotificationObserver theme_change_observer(
+      chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
+      content::Source<ThemeService>(
+          ThemeServiceFactory::GetForProfile(profile())));
+  theme_change_observer.Wait();
   EXPECT_TRUE(processor->changes().empty());
 }
 
 #if BUILDFLAG(ENABLE_SUPERVISED_USERS)
 
 class ExtensionServiceTestSupervised
     : public ExtensionServiceSyncCustomGalleryTest,
       public SupervisedUserService::Delegate {
  public:
   ExtensionServiceTestSupervised()
@@ skipping 890 matching lines @@
         break;
       }
     }
   }
   EXPECT_TRUE(found_delete);
 
   // Make sure there is one extension, and there are no more apps.
   EXPECT_EQ(1u, extensions_processor.data().size());
   EXPECT_TRUE(apps_processor.data().empty());
 }