Add SNAPSHOT sync mode to LocalFileSyncContext::PrepareForSync

chrome/browser/sync_file_system/local/canned_syncable_file_system.cc

 // Copyright 2013 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 "chrome/browser/sync_file_system/local/canned_syncable_file_system.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/guid.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
+#include "chrome/browser/sync_file_system/file_change.h"
 #include "chrome/browser/sync_file_system/local/local_file_change_tracker.h"
 #include "chrome/browser/sync_file_system/local/local_file_sync_context.h"
 #include "chrome/browser/sync_file_system/local/sync_file_system_backend.h"
 #include "chrome/browser/sync_file_system/syncable_file_system_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/browser/blob/mock_blob_url_request_context.h"
 #include "webkit/browser/fileapi/external_mount_points.h"
 #include "webkit/browser/fileapi/file_system_backend.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 #include "webkit/browser/fileapi/file_system_operation_context.h"
@@ skipping 463 matching lines @@
       io_task_runner_.get(),
       FROM_HERE,
       base::Bind(&CannedSyncableFileSystem::DoGetUsageAndQuota,
                  base::Unretained(this),
                  usage,
                  quota));
 }
 
 void CannedSyncableFileSystem::GetChangedURLsInTracker(
     FileSystemURLSet* urls) {
-  return RunOnThread(
+  RunOnThread(
       file_task_runner_.get(),
       FROM_HERE,
       base::Bind(&LocalFileChangeTracker::GetAllChangedURLs,
                  base::Unretained(backend()->change_tracker()),
                  urls));
 }
 
 void CannedSyncableFileSystem::ClearChangeForURLInTracker(
     const FileSystemURL& url) {
-  return RunOnThread(
+  RunOnThread(
       file_task_runner_.get(),
       FROM_HERE,
       base::Bind(&LocalFileChangeTracker::ClearChangesForURL,
                  base::Unretained(backend()->change_tracker()),
                  url));
 }
 
+void CannedSyncableFileSystem::GetChangesForURLInTracker(
+    const FileSystemURL& url,
+    FileChangeList* changes) {
+  RunOnThread(
+      file_task_runner_.get(),
+      FROM_HERE,
+      base::Bind(&LocalFileChangeTracker::GetChangesForURL,
+                 base::Unretained(backend()->change_tracker()),
+                 url, changes));
+}
+
 SyncFileSystemBackend* CannedSyncableFileSystem::backend() {
   return SyncFileSystemBackend::GetBackend(file_system_context_);
 }
 
 FileSystemOperationRunner* CannedSyncableFileSystem::operation_runner() {
   return file_system_context_->operation_runner();
 }
 
 void CannedSyncableFileSystem::OnSyncEnabled(const FileSystemURL& url) {
   sync_status_observers_->Notify(&LocalFileSyncStatus::Observer::OnSyncEnabled,
@@ skipping 151 matching lines @@
   sync_status_ = status;
   base::MessageLoop::current()->Quit();
 }
 
 void CannedSyncableFileSystem::InitializeSyncStatusObserver() {
   ASSERT_TRUE(io_task_runner_->RunsTasksOnCurrentThread());
   backend()->sync_context()->sync_status()->AddObserver(this);
 }
 
 }  // namespace sync_file_system