[Sync] Move attachments code out of core/.

components/sync/core/attachments/in_memory_attachment_store.h

Index: components/sync/core/attachments/in_memory_attachment_store.h
diff --git a/components/sync/core/attachments/in_memory_attachment_store.h b/components/sync/core/attachments/in_memory_attachment_store.h
deleted file mode 100644
index d16546ff55d5767f66917b41a23f8ab771b835f0..0000000000000000000000000000000000000000
--- a/components/sync/core/attachments/in_memory_attachment_store.h
+++ /dev/null
@@ -1,75 +0,0 @@
-// 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 COMPONENTS_SYNC_CORE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_
-#define COMPONENTS_SYNC_CORE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_
-
-#include <map>
-#include <set>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
-#include "components/sync/api/attachments/attachment.h"
-#include "components/sync/api/attachments/attachment_id.h"
-#include "components/sync/api/attachments/attachment_store.h"
-#include "components/sync/api/attachments/attachment_store_backend.h"
-
-namespace base {
-class SequencedTaskRunner;
-}  // namespace base
-
-namespace syncer {
-
-// An in-memory implementation of AttachmentStore used for testing.
-// InMemoryAttachmentStore is not threadsafe, it lives on backend thread and
-// posts callbacks with results on |callback_task_runner|.
-class InMemoryAttachmentStore : public AttachmentStoreBackend,
-                                public base::NonThreadSafe {
- public:
-  InMemoryAttachmentStore(
-      const scoped_refptr<base::SequencedTaskRunner>& callback_task_runner);
-  ~InMemoryAttachmentStore() override;
-
-  // AttachmentStoreBackend implementation.
-  void Init(const AttachmentStore::InitCallback& callback) override;
-  void Read(AttachmentStore::Component component,
-            const AttachmentIdList& ids,
-            const AttachmentStore::ReadCallback& callback) override;
-  void Write(AttachmentStore::Component component,
-             const AttachmentList& attachments,
-             const AttachmentStore::WriteCallback& callback) override;
-  void SetReference(AttachmentStore::Component component,
-                    const AttachmentIdList& ids) override;
-  void DropReference(AttachmentStore::Component component,
-                     const AttachmentIdList& ids,
-                     const AttachmentStore::DropCallback& callback) override;
-  void ReadMetadataById(
-      AttachmentStore::Component component,
-      const AttachmentIdList& ids,
-      const AttachmentStore::ReadMetadataCallback& callback) override;
-  void ReadMetadata(
-      AttachmentStore::Component component,
-      const AttachmentStore::ReadMetadataCallback& callback) override;
-
- private:
-  struct AttachmentEntry {
-    AttachmentEntry(const Attachment& attachment,
-                    AttachmentStore::Component initial_reference_component);
-    AttachmentEntry(const AttachmentEntry& other);
-    ~AttachmentEntry();
-
-    Attachment attachment;
-    std::set<AttachmentStore::Component> components;
-  };
-
-  typedef std::map<AttachmentId, AttachmentEntry> AttachmentEntryMap;
-  AttachmentEntryMap attachments_;
-
-  DISALLOW_COPY_AND_ASSIGN(InMemoryAttachmentStore);
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_CORE_ATTACHMENTS_IN_MEMORY_ATTACHMENT_STORE_H_