Implementation of OnDiskAttachmentStore.

sync/api/attachments/attachment_store.cc

Index: sync/api/attachments/attachment_store.cc
diff --git a/sync/api/attachments/attachment_store.cc b/sync/api/attachments/attachment_store.cc
index ad4489e8d8db63b1d376b75d94fedc803599614f..353ad6bc991fabff9ffe0108b7715e029c1ba029 100644
--- a/sync/api/attachments/attachment_store.cc
+++ b/sync/api/attachments/attachment_store.cc
@@ -7,6 +7,7 @@
 #include "base/thread_task_runner_handle.h"
 #include "sync/internal_api/public/attachments/attachment_store_handle.h"
 #include "sync/internal_api/public/attachments/in_memory_attachment_store.h"
+#include "sync/internal_api/public/attachments/on_disk_attachment_store.h"
 
 namespace syncer {
 
@@ -24,4 +25,12 @@ scoped_refptr<AttachmentStore> AttachmentStore::CreateInMemoryStore() {
       backend.Pass(), base::ThreadTaskRunnerHandle::Get()));
 }
 
+scoped_refptr<AttachmentStore> AttachmentStore::CreateOnDiskStore(
+    const base::FilePath& path) {
+  scoped_ptr<AttachmentStoreBase> backend(
+      new OnDiskAttachmentStore(path, base::ThreadTaskRunnerHandle::Get()));
+  return scoped_refptr<AttachmentStore>(new AttachmentStoreHandle(
+      backend.Pass(), base::ThreadTaskRunnerHandle::Get()));
+}
+
 }  // namespace syncer