[Cleanup] Used scoped pointers in KeyedServiceFactory's SetTestingFactory functions.

chrome/browser/search/hotword_service_unittest.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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "base/test/test_simple_task_runner.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 91 matching lines @@
   }
 
   ExtensionService* extension_service() { return service_; }
 
  private:
   ExtensionService* service_;
   int uninstall_count_;
   std::string extension_id_;
 };
 
-KeyedService* BuildMockHotwordService(content::BrowserContext* context) {
-  return new MockHotwordService(static_cast<Profile*>(context));
+scoped_ptr<KeyedService> BuildMockHotwordService(
+    content::BrowserContext* context) {
+  return make_scoped_ptr(
+      new MockHotwordService(static_cast<Profile*>(context)));
 }
 
 }  // namespace
 
 class HotwordServiceTest :
   public extensions::ExtensionServiceTestBase,
   public ::testing::WithParamInterface<const char*> {
  protected:
   HotwordServiceTest() {}
   virtual ~HotwordServiceTest() {}
@@ skipping 375 matching lines @@
   EXPECT_EQ(1, audio_history_handler->GetAudioHistoryCalls());
   // We expect the next check for audio history to be in the queue.
   EXPECT_EQ(base::TimeDelta::FromDays(1),
             test_task_runner->NextPendingTaskDelay());
   EXPECT_TRUE(test_task_runner->HasPendingTask());
   test_task_runner->RunPendingTasks();
   EXPECT_EQ(2, audio_history_handler->GetAudioHistoryCalls());
   EXPECT_TRUE(test_task_runner->HasPendingTask());
   test_task_runner->ClearPendingTasks();
 }