Refactor FileSystemOperation to take callback for each method.

content/browser/file_system/file_system_dispatcher_host.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_FILE_SYSTEM_FILE_SYSTEM_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_FILE_SYSTEM_FILE_SYSTEM_DISPATCHER_HOST_H_
 
 #include <set>
 
 #include "base/basictypes.h"
+#include "base/file_util_proxy.h"
 #include "base/id_map.h"
+#include "base/platform_file.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "webkit/fileapi/file_system_types.h"
 
 class FilePath;
 class GURL;
 
 namespace base {
 class Time;
 }
 
@@ skipping 59 matching lines @@
                    const GURL& path,
                    const base::Time& last_access_time,
                    const base::Time& last_modified_time);
   void OnCancel(int request_id, int request_to_cancel);
   void OnOpenFile(int request_id, const GURL& path, int file_flags);
   void OnWillUpdate(const GURL& path);
   void OnDidUpdate(const GURL& path, int64 delta);
   void OnSyncGetPlatformPath(const GURL& path,
                              FilePath* platform_path);
 
+  // Callback functions to be used when each file operation is finished.
+  void DidFinish(int request_id, base::PlatformFileError result);
+  void DidGetMetadata(int request_id,
+                      base::PlatformFileError result,
+                      const base::PlatformFileInfo& info,
+                      const FilePath& platform_path);
+  void DidReadDirectory(int request_id,
+                        base::PlatformFileError result,
+                        const std::vector<base::FileUtilProxy::Entry>& entries,
+                        bool has_more);
+  void DidOpenFile(int request_id,
+                   base::PlatformFileError result,
+                   base::PlatformFile file,
+                   base::ProcessHandle peer_handle);
+  void DidWrite(int request_id,
+                base::PlatformFileError result,
+                int64 bytes,
+                bool complete);
+  void DidOpenFileSystem(int request_id,
+                         base::PlatformFileError result,
+                         const std::string& name,
+                         const GURL& root);
+
   // Creates a new FileSystemOperationInterface based on |target_path|.
   fileapi::FileSystemOperationInterface* GetNewOperation(
       const GURL& target_path,
       int request_id);
 
   fileapi::FileSystemContext* context_;
 
   // Keeps ongoing file system operations.
   typedef IDMap<fileapi::FileSystemOperationInterface> OperationsMap;
   OperationsMap operations_;
 
   // The getter holds the context until Init() can be called from the
   // IO thread, which will extract the net::URLRequestContext from it.
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   net::URLRequestContext* request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystemDispatcherHost);
 };
 
 #endif  // CONTENT_BROWSER_FILE_SYSTEM_FILE_SYSTEM_DISPATCHER_HOST_H_