SyncFS: Introduce SyncFileSystemBackend

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 29c8a282dbc381e69f04a81df6a8b490cc317765..3e96e5051f6c7645171f6dff753e863d48632e92 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -69,9 +69,12 @@ class SelectFilePolicy;
 namespace fileapi {
 class ExternalMountPoints;
 class FileSystemMountPointProvider;
+class FileSystemOptions;
+class FileSystemTaskRunners;
 }
 
 namespace quota {
+class QuotaManagerProxy;
 class SpecialStoragePolicy;
 }
 
@@ -572,6 +575,9 @@ class CONTENT_EXPORT ContentBrowserClient {
       const base::FilePath& storage_partition_path,
       quota::SpecialStoragePolicy* special_storage_policy,
       fileapi::ExternalMountPoints* external_mount_points,
+      quota::QuotaManagerProxy* quota_manager_proxy,
+      fileapi::FileSystemTaskRunners* task_runners,
+      const fileapi::FileSystemOptions& options,
       ScopedVector<fileapi::FileSystemMountPointProvider>*
           additional_providers) {}