Fix ExtensionServiceTest.ClearExtensionData flakiness

chrome/browser/extensions/extension_storage_monitor.cc

 // Copyright 2014 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/extensions/extension_storage_monitor.h"
 
 #include <map>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 306 matching lines @@
   uninstall_extension_id_.clear();
   if (!extension)
     return;
 
   ExtensionService* service =
       ExtensionSystem::Get(context_)->extension_service();
   DCHECK(service);
   service->UninstallExtension(
       extension->id(),
       extensions::UNINSTALL_REASON_STORAGE_THRESHOLD_EXCEEDED,
+      base::Bind(&base::DoNothing),
       NULL);
 }
 
 void ExtensionStorageMonitor::ExtensionUninstallCanceled() {
   uninstall_extension_id_.clear();
 }
 
 std::string ExtensionStorageMonitor::GetNotificationId(
     const std::string& extension_id) {
   std::vector<std::string> placeholders;
@@ skipping 274 matching lines @@
 void ExtensionStorageMonitor::SetStorageNotificationEnabled(
     const std::string& extension_id,
     bool enable_notifications) {
   extension_prefs_->UpdateExtensionPref(
       extension_id,
       kPrefDisableStorageNotifications,
       enable_notifications ? NULL : new base::FundamentalValue(true));
 }
 
 }  // namespace extensions