Support file system access in DevTools with isolated file system.

chrome/browser/devtools/devtools_file_system_helper.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 CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_SYSTEM_HELPER_H_
+#define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_SYSTEM_HELPER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+
+class FilePath;
+class Profile;
+
+namespace content {
+class WebContents;
+}
+
+class DevToolsFileSystemHelper

[pfeldman, 2012/12/24 19:01:03]

I think devtools_file_helper is sufficient and you should merge this one into
it. Eventually, we will want everyone to use functionality of this one.

+    : public base::RefCountedThreadSafe<DevToolsFileSystemHelper> {
+ public:
+  struct FileSystem {
+    FileSystem(const std::string& filesystem_id,
+               const std::string& registered_name,
+               const std::string& file_system_path);
+
+    std::string filesystem_id;
+    std::string registered_name;
+    std::string file_system_path;
+  };
+
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+    virtual void FileSystemPermissionsLoaded(
+        std::vector<DevToolsFileSystemHelper::FileSystem> file_systems) = 0;
+    virtual void FileSystemFolderSelected(FileSystem file_system) = 0;
+    virtual void FileSystemFolderSelectionCanceled() = 0;
+    virtual void FileSystemFolderSelectionError(std::string error_string) = 0;
+  };
+
+  DevToolsFileSystemHelper(
+      content::WebContents* web_contents,
+      Profile* profile,
+      Delegate* delegate);
+  ~DevToolsFileSystemHelper();
+
+  void SelectFolderAndGrantPermission();

[pfeldman, 2012/12/24 19:01:03]

It seems like these will produce corresponding delegate responses. Consider
using base::Callback as a second callback parameter if so.

Btw, all these names sound confusing. What "permission"?

+  void RequestPermissions();
+  void RevokePermission(const std::string& file_system_path);
+
+ private:
+  void FolderSelected(const FilePath& path);
+  void FolderSelectionCanceled();
+  void CheckSelectedPath(const FilePath& path);
+  void SelectedFileSystemPermitted(const FilePath& path);
+  void SelectedFileSystemForbidden();
+  void CheckSavedPathes(const std::vector<FilePath>& file_pathes);
+  void RegisterSavedFileSystems(const std::vector<FilePath>& file_pathes);
+
+  class SelectFolderDialog;
+
+  content::WebContents* web_contents_;
+  Profile* profile_;
+  Delegate* delegate_;
+  scoped_refptr<SelectFolderDialog> select_folder_dialog_;
+  DISALLOW_COPY_AND_ASSIGN(DevToolsFileSystemHelper);
+};
+
+#endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_FILE_SYSTEM_HELPER_H_