Update sync API to support attachments.

chrome/browser/sync/profile_sync_components_factory_impl.cc

Index: chrome/browser/sync/profile_sync_components_factory_impl.cc
diff --git a/chrome/browser/sync/profile_sync_components_factory_impl.cc b/chrome/browser/sync/profile_sync_components_factory_impl.cc
index f8374d7eaa572a54a001010c2d5ca861636140b9..bd383f3ea8ba959dc88197974635293d2152810d 100644
--- a/chrome/browser/sync/profile_sync_components_factory_impl.cc
+++ b/chrome/browser/sync/profile_sync_components_factory_impl.cc
@@ -68,6 +68,9 @@
 #include "components/sync_driver/proxy_data_type_controller.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/extension_system.h"
+#include "sync/api/attachments/attachment_service.h"
+#include "sync/api/attachments/fake_attachment_service.h"
+#include "sync/api/attachments/fake_attachment_store.h"
 #include "sync/api/syncable_service.h"
 
 #if defined(ENABLE_MANAGED_USERS)
@@ -429,10 +432,18 @@ browser_sync::GenericChangeProcessor*
         const base::WeakPtr<syncer::SyncableService>& local_service,
         const base::WeakPtr<syncer::SyncMergeResult>& merge_result) {
   syncer::UserShare* user_share = profile_sync_service->GetUserShare();
+  // TODO(maniscalco): Construct a real AttachmentService with a real
+  // AttachmentStore instead of this fake stuff.
+  scoped_ptr<syncer::AttachmentStore> attachment_store(
+      new syncer::FakeAttachmentStore(
+          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)));
+  scoped_ptr<syncer::AttachmentService> attachment_service(
+      new syncer::FakeAttachmentService(attachment_store.Pass()));
   return new GenericChangeProcessor(error_handler,
                                     local_service,
                                     merge_result,
-                                    user_share);
+                                    user_share,
+                                    attachment_service.Pass());
 }
 
 browser_sync::SharedChangeProcessor* ProfileSyncComponentsFactoryImpl::