Fix ExtensionServiceTest.ClearExtensionData flakiness

chrome/browser/apps/ephemeral_app_service.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 "chrome/browser/apps/ephemeral_app_service.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/apps/ephemeral_app_service_factory.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 85 matching lines @@
 
     // Do not remove apps that are running.
     if (!extensions::util::IsExtensionIdle(extension_id, profile_))
       continue;
 
     DCHECK(registry->GetExtensionById(extension_id,
                                       ExtensionRegistry::EVERYTHING));
     service->UninstallExtension(
         extension_id,
         extensions::UNINSTALL_REASON_ORPHANED_EPHEMERAL_EXTENSION,
+        base::Bind(&base::DoNothing),
         NULL);
   }
 }
 
 void EphemeralAppService::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_EXTENSIONS_READY: {
@@ skipping 115 matching lines @@
   if (!app_launch_times.empty()) {
     GetAppsToRemove(app_count, app_launch_times, &remove_app_ids);
 
     for (std::set<std::string>::const_iterator id = remove_app_ids.begin();
          id != remove_app_ids.end(); ++id) {
       // Protect against cascading uninstalls.
       if (!registry->GetExtensionById(*id, ExtensionRegistry::EVERYTHING))
         continue;
 
       service->UninstallExtension(
-          *id, extensions::UNINSTALL_REASON_ORPHANED_EPHEMERAL_EXTENSION, NULL);
+          *id,
+          extensions::UNINSTALL_REASON_ORPHANED_EPHEMERAL_EXTENSION,
+          base::Bind(&base::DoNothing),
+          NULL);
     }
   }
 }
 
 // static
 void EphemeralAppService::GetAppsToRemove(
     int app_count,
     const LaunchTimeAppMap& app_launch_times,
     std::set<std::string>* remove_app_ids) {
   base::Time time_now = base::Time::Now();
@@ skipping 13 matching lines @@
     // Remove ephemeral apps that have been inactive for a while or if the cache
     // is larger than the desired size.
     if (it->first < inactive_threshold || app_count > kMaxEphemeralAppsCount) {
       remove_app_ids->insert(it->second);
       --app_count;
     } else {
       break;
     }
   }
 }