[NOCOMMIT] Make DriveService{Wrapper|Messenger} class

chrome/browser/sync_file_system/drive_backend/drive_service_messenger.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.
 
-#ifndef CHROME_BROWSER_DRIVE_DUMMY_DRIVE_SERVICE_H_
-#define CHROME_BROWSER_DRIVE_DUMMY_DRIVE_SERVICE_H_
+#ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_SERVICE_MESSENGER_H_
+#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_SERVICE_MESSENGER_H_
 
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/drive/drive_service_interface.h"
-#include "google_apis/drive/auth_service_interface.h"
 
 namespace drive {
+class DriveServiceObserver;
+}
 
-// Dummy implementation of DriveServiceInterface.
-// All functions do nothing, or return place holder values like 'true'.
-class DummyDriveService : public DriveServiceInterface {
+namespace sync_file_system {
+namespace drive_backend {
+
+class DriveServiceWrapper;
+
+// This class is a wrapper of drive::DriveServiceInterface class, and
+// is used by SyncTaskManager.  This class runs in a worker thread and posts
+// tasks to UI thread.
+class DriveServiceMessenger : public drive::DriveServiceInterface {
  public:
-  DummyDriveService();
-  virtual ~DummyDriveService();
+  DriveServiceMessenger(const base::WeakPtr<DriveServiceWrapper>& wrapper);
+  virtual ~DriveServiceMessenger();
 
-  // DriveServiceInterface Overrides
+  // Common service:
   virtual void Initialize(const std::string& account_id) OVERRIDE;
-  virtual void AddObserver(DriveServiceObserver* observer) OVERRIDE;
-  virtual void RemoveObserver(DriveServiceObserver* observer) OVERRIDE;
+  virtual void AddObserver(drive::DriveServiceObserver* observer) OVERRIDE;
+  virtual void RemoveObserver(drive::DriveServiceObserver* observer) OVERRIDE;
   virtual bool CanSendRequest() const OVERRIDE;
-  virtual ResourceIdCanonicalizer GetResourceIdCanonicalizer() const OVERRIDE;
+  virtual drive::ResourceIdCanonicalizer GetResourceIdCanonicalizer()
+      const OVERRIDE;
+
+  // Authentication service:
   virtual bool HasAccessToken() const OVERRIDE;
   virtual void RequestAccessToken(
       const google_apis::AuthStatusCallback& callback) OVERRIDE;
   virtual bool HasRefreshToken() const OVERRIDE;
   virtual void ClearAccessToken() OVERRIDE;
   virtual void ClearRefreshToken() OVERRIDE;
+
+  // Document access:
   virtual std::string GetRootResourceId() const OVERRIDE;
   virtual google_apis::CancelCallback GetAllResourceList(
       const google_apis::GetResourceListCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback GetResourceListInDirectory(
       const std::string& directory_resource_id,
       const google_apis::GetResourceListCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback Search(
       const std::string& search_query,
       const google_apis::GetResourceListCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback SearchByTitle(
@@ skipping 20 matching lines @@
       const google_apis::AboutResourceCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback GetAppList(
       const google_apis::AppListCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback DeleteResource(
       const std::string& resource_id,
       const std::string& etag,
       const google_apis::EntryActionCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback TrashResource(
       const std::string& resource_id,
       const google_apis::EntryActionCallback& callback) OVERRIDE;
-  virtual google_apis::CancelCallback DownloadFile(
-      const base::FilePath& local_cache_path,
-      const std::string& resource_id,
-      const google_apis::DownloadActionCallback& download_action_callback,
-      const google_apis::GetContentCallback& get_content_callback,
-      const google_apis::ProgressCallback& progress_callback) OVERRIDE;
   virtual google_apis::CancelCallback CopyResource(
       const std::string& resource_id,
       const std::string& parent_resource_id,
       const std::string& new_title,
       const base::Time& last_modified,
       const google_apis::GetResourceEntryCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback UpdateResource(
       const std::string& resource_id,
       const std::string& parent_resource_id,
       const std::string& new_title,
@@ skipping 10 matching lines @@
       const google_apis::EntryActionCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback RemoveResourceFromDirectory(
       const std::string& parent_resource_id,
       const std::string& resource_id,
       const google_apis::EntryActionCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback AddNewDirectory(
       const std::string& parent_resource_id,
       const std::string& directory_title,
       const AddNewDirectoryOptions& options,
       const google_apis::GetResourceEntryCallback& callback) OVERRIDE;
+  virtual google_apis::CancelCallback DownloadFile(
+      const base::FilePath& local_cache_path,
+      const std::string& resource_id,
+      const google_apis::DownloadActionCallback& download_action_callback,
+      const google_apis::GetContentCallback& get_content_callback,
+      const google_apis::ProgressCallback& progress_callback) OVERRIDE;
   virtual google_apis::CancelCallback InitiateUploadNewFile(
       const std::string& content_type,
       int64 content_length,
       const std::string& parent_resource_id,
       const std::string& title,
       const InitiateUploadNewFileOptions& options,
       const google_apis::InitiateUploadCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback InitiateUploadExistingFile(
       const std::string& content_type,
       int64 content_length,
@@ skipping 18 matching lines @@
       const std::string& app_id,
       const google_apis::AuthorizeAppCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback UninstallApp(
       const std::string& app_id,
       const google_apis::EntryActionCallback& callback) OVERRIDE;
   virtual google_apis::CancelCallback AddPermission(
       const std::string& resource_id,
       const std::string& email,
       google_apis::drive::PermissionRole role,
       const google_apis::EntryActionCallback& callback) OVERRIDE;
+
+  drive::DriveServiceInterface* GetDriveService();
+
+ private:
+  base::WeakPtr<DriveServiceWrapper> wrapper_;
+
+  DISALLOW_COPY_AND_ASSIGN(DriveServiceMessenger);
 };
 
-}  // namespace drive
+}  // namespace drive_backend
+}  // namespace sync_file_system
 
-#endif  // CHROME_BROWSER_DRIVE_DUMMY_DRIVE_SERVICE_H_
+#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_SERVICE_WRAPPER_H_