FileAPI: Split recursive remove into multiple async tasks

webkit/fileapi/file_system_file_util_proxy.h

Index: webkit/fileapi/file_system_file_util_proxy.h
diff --git a/webkit/fileapi/file_system_file_util_proxy.h b/webkit/fileapi/file_system_file_util_proxy.h
index 654fbf913f0a794dc24b9959b6a381ea5b6486ee..955cd1bd31e79eea0fa7f4762f9fe7c5237c51f3 100644
--- a/webkit/fileapi/file_system_file_util_proxy.h
+++ b/webkit/fileapi/file_system_file_util_proxy.h
@@ -41,13 +41,18 @@ class FileSystemFileUtilProxy {
            FileSystemFileUtil::SnapshotFilePolicy snapshot_policy)>
       SnapshotFileCallback;
 
-  // Deletes a file or a directory on the given context's task_runner.
-  // It is an error to delete a non-empty directory with recursive=false.
-  static bool Delete(
+  // Deletes a file on the given context's task_runner.
+  static bool DeleteFile(
+      FileSystemOperationContext* context,
+      FileSystemFileUtil* file_util,
+      const FileSystemURL& url,
+      const StatusCallback& callback);
+
+  // Deletes a directory on the given context's task_runner.
+  static bool DeleteDirectory(
       FileSystemOperationContext* context,
       FileSystemFileUtil* file_util,
       const FileSystemURL& url,
-      bool recursive,
       const StatusCallback& callback);
 
   // Creates or opens a file with the given flags by calling |file_util|'s