[NOCOMMIT] Make DriveService{Wrapper|Messenger} class

chrome/browser/sync_file_system/drive_backend/sync_engine_initializer_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/sync_engine_initializer.h"
 
 #include "base/bind.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
 #include "chrome/browser/drive/drive_api_util.h"
@@ skipping 30 matching lines @@
     FileTracker tracker;
   };
 
   SyncEngineInitializerTest() {}
   virtual ~SyncEngineInitializerTest() {}
 
   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);
 
     sync_context_.reset(new SyncEngineContext(
-        fake_drive_service_.get(),
+        fake_drive_service.PassAs<drive::DriveServiceInterface>(),
         NULL /* drive_uploader */,
         base::MessageLoopProxy::current(),
         base::MessageLoopProxy::current()));
 
     sync_task_manager_.reset(new SyncTaskManager(
         base::WeakPtr<SyncTaskManager::Client>(),
         1 /* maximum_parallel_task */));
     sync_task_manager_->Initialize(SYNC_STATUS_OK);
   }
 
   virtual void TearDown() OVERRIDE {
     sync_task_manager_.reset();
     metadata_database_.reset();
     sync_context_.reset();
-    fake_drive_service_.reset();
     base::RunLoop().RunUntilIdle();
   }
 
   base::FilePath database_path() {
     return database_dir_.path();
   }
 
   SyncStatusCode RunInitializer() {
     SyncEngineInitializer* initializer =
         new SyncEngineInitializer(
@@ skipping 142 matching lines @@
   }
 
  private:
   content::TestBrowserThreadBundle browser_threads_;
   base::ScopedTempDir database_dir_;
   scoped_ptr<leveldb::Env> in_memory_env_;
 
   scoped_ptr<MetadataDatabase> metadata_database_;
   scoped_ptr<SyncTaskManager> sync_task_manager_;
   scoped_ptr<SyncEngineContext> sync_context_;
-  scoped_ptr<drive::FakeDriveService> fake_drive_service_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncEngineInitializerTest);
 };
 
 TEST_F(SyncEngineInitializerTest, EmptyDatabase_NoRemoteSyncRoot) {
   EXPECT_EQ(SYNC_STATUS_OK, RunInitializer());
 
   std::string sync_root_folder_id = GetSyncRootFolderID();
   EXPECT_EQ(1u, CountTrackersForFile(sync_root_folder_id));
 
@@ skipping 110 matching lines @@
 
   EXPECT_EQ(0u, CountTrackersForFile(sync_root->file_id()));
   EXPECT_FALSE(HasNoParent(sync_root->file_id()));
 
   EXPECT_EQ(1u, CountFileMetadata());
   EXPECT_EQ(1u, CountFileTracker());
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system