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

extensions/browser/api/storage/storage_frontend_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/bind.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
@@ skipping 42 matching lines @@
   void TearDown() override {
     frontend_.reset();
     // Execute any pending deletion tasks.
     message_loop_.RunUntilIdle();
     ExtensionsTest::TearDown();
   }
 
  protected:
   void ResetFrontend() {
     storage_factory_->Reset(new LeveldbSettingsStorageFactory());
-    frontend_.reset(
-        StorageFrontend::CreateForTesting(storage_factory_, browser_context()));
+    frontend_ = StorageFrontend::CreateForTesting(storage_factory_,
+                                                  browser_context()).Pass();
   }
 
   base::ScopedTempDir temp_dir_;
   scoped_ptr<StorageFrontend> frontend_;
   scoped_refptr<util::ScopedSettingsStorageFactory> storage_factory_;
 
  private:
   base::MessageLoop message_loop_;
   content::TestBrowserThread ui_thread_;
   content::TestBrowserThread file_thread_;
@@ skipping 136 matching lines @@
   // Local storage should run out after ~5MB.
   scoped_ptr<base::Value> megabyte = util::CreateMegabyte();
   for (int i = 0; i < 5; ++i) {
     local_storage->Set(DEFAULTS, base::StringPrintf("%d", i), *megabyte);
   }
 
   EXPECT_TRUE(local_storage->Set(DEFAULTS, "WillError", *megabyte)->HasError());
 }
 
 }  // namespace extensions