[Sync] Remove DropAttachments from AttachmentService and SyncData

sync/internal_api/attachments/attachment_service_proxy.cc

 // 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.
 
 #include "sync/internal_api/public/attachments/attachment_service_proxy.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/thread_task_runner_handle.h"
 
 namespace syncer {
 
 namespace {
 
 // These ProxyFooCallback functions are used to invoke a callback in a specific
 // thread.
 
 // Invokes |callback| with |result| and |attachments| in the |task_runner|
 // thread.
 void ProxyGetOrDownloadCallback(
     const scoped_refptr<base::SequencedTaskRunner>& task_runner,
     const AttachmentService::GetOrDownloadCallback& callback,
     const AttachmentService::GetOrDownloadResult& result,
     scoped_ptr<AttachmentMap> attachments) {
   task_runner->PostTask(
       FROM_HERE, base::Bind(callback, result, base::Passed(&attachments)));
 }
 
-// Invokes |callback| with |result| and |attachments| in the |task_runner|
-// thread.
-void ProxyDropCallback(
-    const scoped_refptr<base::SequencedTaskRunner>& task_runner,
-    const AttachmentService::DropCallback& callback,
-    const AttachmentService::DropResult& result) {
-  task_runner->PostTask(FROM_HERE, base::Bind(callback, result));
-}
-
 }  // namespace
 
 AttachmentServiceProxy::AttachmentServiceProxy() {
 }
 
 AttachmentServiceProxy::AttachmentServiceProxy(
     const scoped_refptr<base::SequencedTaskRunner>& wrapped_task_runner,
     const base::WeakPtr<syncer::AttachmentService>& wrapped)
     : wrapped_task_runner_(wrapped_task_runner), core_(new Core(wrapped)) {
   DCHECK(wrapped_task_runner_.get());
@@ skipping 23 matching lines @@
                  base::ThreadTaskRunnerHandle::Get(),
                  callback);
   wrapped_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&AttachmentService::GetOrDownloadAttachments,
                  core_,
                  attachment_ids,
                  proxy_callback));
 }
 
-void AttachmentServiceProxy::DropAttachments(
-    const AttachmentIdList& attachment_ids,
-    const DropCallback& callback) {
-  DCHECK(wrapped_task_runner_.get());
-  DropCallback proxy_callback = base::Bind(
-      &ProxyDropCallback, base::ThreadTaskRunnerHandle::Get(), callback);
-  wrapped_task_runner_->PostTask(FROM_HERE,
-                                 base::Bind(&AttachmentService::DropAttachments,
-                                            core_,
-                                            attachment_ids,
-                                            proxy_callback));
-}
-
 void AttachmentServiceProxy::UploadAttachments(
     const AttachmentIdSet& attachment_ids) {
   DCHECK(wrapped_task_runner_.get());
   wrapped_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&AttachmentService::UploadAttachments, core_, attachment_ids));
 }
 
 AttachmentServiceProxy::Core::Core(
     const base::WeakPtr<syncer::AttachmentService>& wrapped)
     : wrapped_(wrapped) {
 }
 
 AttachmentServiceProxy::Core::~Core() {
 }
 
 AttachmentStore* AttachmentServiceProxy::Core::GetStore() {
   return NULL;
 }
 
 void AttachmentServiceProxy::Core::GetOrDownloadAttachments(
     const AttachmentIdList& attachment_ids,
     const GetOrDownloadCallback& callback) {
   if (!wrapped_) {
     return;
   }
   wrapped_->GetOrDownloadAttachments(attachment_ids, callback);
 }
 
-void AttachmentServiceProxy::Core::DropAttachments(
-    const AttachmentIdList& attachment_ids,
-    const DropCallback& callback) {
-  if (!wrapped_) {
-    return;
-  }
-  wrapped_->DropAttachments(attachment_ids, callback);
-}
-
 void AttachmentServiceProxy::Core::UploadAttachments(
     const AttachmentIdSet& attachment_ids) {
   if (!wrapped_) {
     return;
   }
   wrapped_->UploadAttachments(attachment_ids);
 }
 
 }  // namespace syncer