[NOCOMMIT] Make DriveService{Wrapper|Messenger} class

chrome/browser/sync_file_system/drive_backend/list_changes_task_unittest.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/sync_file_system/drive_backend/list_changes_task.h"
 
 #include <string>
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/format_macros.h"
@@ skipping 24 matching lines @@
 
 class ListChangesTaskTest : public testing::Test {
  public:
   ListChangesTaskTest() {}
   virtual ~ListChangesTaskTest() {}
 
   virtual void SetUp() OVERRIDE {
     ASSERT_TRUE(database_dir_.CreateUniqueTempDir());
     in_memory_env_.reset(leveldb::NewMemEnv(leveldb::Env::Default()));
 
-    fake_drive_service_.reset(new drive::FakeDriveService);
+    scoped_ptr<drive::FakeDriveService>
+        fake_drive_service(new drive::FakeDriveService);
 
     drive_uploader_.reset(
-        new drive::DriveUploader(fake_drive_service_.get(),
+        new drive::DriveUploader(fake_drive_service.get(),
                                  base::MessageLoopProxy::current()));
 
     fake_drive_service_helper_.reset(
-        new FakeDriveServiceHelper(fake_drive_service_.get(),
+        new FakeDriveServiceHelper(fake_drive_service.get(),
                                    drive_uploader_.get(),
                                    kSyncRootFolderTitle));
 
     sync_task_manager_.reset(new SyncTaskManager(
         base::WeakPtr<SyncTaskManager::Client>(),
         10 /* maximum_background_task */));
     sync_task_manager_->Initialize(SYNC_STATUS_OK);
 
-    context_.reset(
-        new SyncEngineContext(fake_drive_service_.get(),
-                              drive_uploader_.get(),
-                              base::MessageLoopProxy::current(),
-                              base::MessageLoopProxy::current()));
+    context_.reset(new SyncEngineContext(
+        fake_drive_service.PassAs<drive::DriveServiceInterface>(),
+        drive_uploader_.get(),
+        base::MessageLoopProxy::current(),
+        base::MessageLoopProxy::current()));
 
     SetUpRemoteFolders();
 
     InitializeMetadataDatabase();
     RegisterApp(kAppID);
   }
 
   virtual void TearDown() OVERRIDE {
     sync_task_manager_.reset();
     context_.reset();
-    fake_drive_service_.reset();
     drive_uploader_.reset();
     base::RunLoop().RunUntilIdle();
   }
 
  protected:
   SyncStatusCode RunTask(scoped_ptr<SyncTask> sync_task) {
     SyncStatusCode status = SYNC_STATUS_UNKNOWN;
     sync_task_manager_->ScheduleSyncTask(
         FROM_HERE, sync_task.Pass(),
         SyncTaskManager::PRIORITY_MED,
@@ skipping 110 matching lines @@
   scoped_ptr<leveldb::Env> in_memory_env_;
 
   std::string sync_root_folder_id_;
   std::string app_root_folder_id_;
   std::string unregistered_app_root_folder_id_;
 
   content::TestBrowserThreadBundle browser_threads_;
   base::ScopedTempDir database_dir_;
 
   scoped_ptr<SyncEngineContext> context_;
-  scoped_ptr<drive::FakeDriveService> fake_drive_service_;
   scoped_ptr<drive::DriveUploaderInterface> drive_uploader_;
   scoped_ptr<FakeDriveServiceHelper> fake_drive_service_helper_;
 
   scoped_ptr<SyncTaskManager> sync_task_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(ListChangesTaskTest);
 };
 
 TEST_F(ListChangesTaskTest, NoChange) {
   size_t num_dirty_trackers = CountDirtyTracker();
@@ skipping 22 matching lines @@
   SetUpChangesInFolder(app_root_folder_id());
 
   EXPECT_EQ(SYNC_STATUS_OK, RunTask(
       scoped_ptr<SyncTask>(new ListChangesTask(GetSyncEngineContext()))));
 
   EXPECT_EQ(num_dirty_trackers + 4, CountDirtyTracker());
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system