[Sync] Refactor AttachmentStore classes. Introduce concept of referrer.

chrome/browser/sync/profile_sync_components_factory_impl.cc

 // Copyright (c) 2012 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 "build/build_config.h"
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/bookmarks/enhanced_bookmarks_features.h"
 #include "chrome/browser/dom_distiller/dom_distiller_service_factory.h"
 #include "chrome/browser/history/history_service.h"
@@ skipping 622 matching lines @@
 TokenServiceProvider::GetTokenServiceTaskRunner() {
   return task_runner_;
 }
 
 OAuth2TokenService* TokenServiceProvider::GetTokenService() {
   return token_service_;
 }
 
 scoped_ptr<syncer::AttachmentService>
 ProfileSyncComponentsFactoryImpl::CreateAttachmentService(
-    const scoped_refptr<syncer::AttachmentStore>& attachment_store,
+    scoped_ptr<syncer::AttachmentStore> attachment_store,
     const syncer::UserShare& user_share,
     const std::string& store_birthday,
     syncer::ModelType model_type,
     syncer::AttachmentService::Delegate* delegate) {
   scoped_ptr<syncer::AttachmentUploader> attachment_uploader;
   scoped_ptr<syncer::AttachmentDownloader> attachment_downloader;
   // Only construct an AttachmentUploader and AttachmentDownload if we have sync
   // credentials. We may not have sync credentials because there may not be a
   // signed in sync user (e.g. sync is running in "backup" mode).
   if (!user_share.sync_credentials.email.empty() &&
@@ skipping 24 matching lines @@
   }
 
   // It is important that the initial backoff delay is relatively large.  For
   // whatever reason, the server may fail all requests for a short period of
   // time.  When this happens we don't want to overwhelm the server with
   // requests so we use a large initial backoff.
   const base::TimeDelta initial_backoff_delay =
       base::TimeDelta::FromMinutes(30);
   const base::TimeDelta max_backoff_delay = base::TimeDelta::FromHours(4);
   scoped_ptr<syncer::AttachmentService> attachment_service(
-      new syncer::AttachmentServiceImpl(attachment_store,
-                                        attachment_uploader.Pass(),
-                                        attachment_downloader.Pass(),
-                                        delegate,
-                                        initial_backoff_delay,
-                                        max_backoff_delay));
+      new syncer::AttachmentServiceImpl(
+          attachment_store.Pass(), attachment_uploader.Pass(),
+          attachment_downloader.Pass(), delegate, initial_backoff_delay,
+          max_backoff_delay));
   return attachment_service.Pass();
 }
 
 ProfileSyncComponentsFactory::SyncComponents
     ProfileSyncComponentsFactoryImpl::CreateBookmarkSyncComponents(
         ProfileSyncService* profile_sync_service,
         sync_driver::DataTypeErrorHandler* error_handler) {
   BookmarkModel* bookmark_model =
       BookmarkModelFactory::GetForProfile(profile_sync_service->profile());
   syncer::UserShare* user_share = profile_sync_service->GetUserShare();
@@ skipping 25 matching lines @@
       new TypedUrlModelAssociator(profile_sync_service,
                                   history_backend,
                                   error_handler);
   TypedUrlChangeProcessor* change_processor =
       new TypedUrlChangeProcessor(profile_,
                                   model_associator,
                                   history_backend,
                                   error_handler);
   return SyncComponents(model_associator, change_processor);
 }