Move chrome.fileSystem implementation to //extensions

extensions/browser/api/file_system/file_system_delegate.h

+// Copyright 2017 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 EXTENSIONS_BROWSER_API_FILE_SYSTEM_FILE_SYSTEM_DELEGATE_H_
+#define EXTENSIONS_BROWSER_API_FILE_SYSTEM_FILE_SYSTEM_DELEGATE_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "build/build_config.h"
+#include "extensions/browser/api/file_system/saved_files_service_delegate.h"
+#include "extensions/common/api/file_system.h"
+#include "ui/shell_dialogs/select_file_dialog.h"
+
+#if defined(OS_CHROMEOS)
+class UIThreadExtensionFunction;
+#endif
+
+namespace base {
+class FilePath;
+}  // namespace base
+
+namespace content {
+class BrowserContext;
+class RenderFrameHost;
+class WebContents;
+}  // namespace content
+
+namespace ui {
+class SelectFilePolicy;
+}  // namespace ui
+
+namespace extensions {
+
+class Extension;
+
+// Delegate class for embedder-specific file system access.
+class FileSystemDelegate {
+ public:
+  using ErrorCallback = base::Callback<void(const std::string&)>;
+  using FileSystemCallback =
+      base::Callback<void(const std::string& id, const std::string& path)>;
+  using VolumeListCallback =
+      base::Callback<void(const std::vector<api::file_system::Volume>&)>;
+
+  virtual ~FileSystemDelegate() {}
+
+  virtual base::FilePath GetDefaultDirectory() = 0;
+
+  virtual std::unique_ptr<ui::SelectFilePolicy> CreateSelectFilePolicy(

[Devlin, 2017/06/14 14:53:22]

add function comments

[michaelpg, 2017/06/21 00:40:08]

Done.

+      content::WebContents* web_contents) = 0;
+
+  virtual scoped_refptr<ui::SelectFileDialog> CreateSelectFileDialog(
+      ui::SelectFileDialog::Listener* listener,
+      std::unique_ptr<ui::SelectFilePolicy> policy) = 0;
+
+  virtual void ShowSelectFileDialogForWebContents(
+      scoped_refptr<ui::SelectFileDialog> dialog,
+      content::WebContents* web_contents,
+      ui::SelectFileDialog::Type type,
+      const base::FilePath& default_path,
+      const ui::SelectFileDialog::FileTypeInfo* file_types) = 0;
+
+  virtual void ConfirmSensitiveDirectoryAccess(
+      bool writable,
+      const base::string16& app_name,
+      content::WebContents* web_contents,
+      const base::Closure& on_accept,
+      const base::Closure& on_cancel) = 0;
+
+  // Finds a string describing the accept type. On success, returns true and
+  // populates |description_id|.
+  virtual bool GetDescriptionIdForAcceptType(const std::string& accept_type,
+                                             int* description_id) = 0;
+
+#if defined(OS_CHROMEOS)
+  virtual bool IsGrantable(content::BrowserContext* browser_context,
+                           content::RenderFrameHost* render_frame_host,
+                           const Extension& extension) = 0;
+
+  // Grants or denies an extension's request for access to the named file
+  // system. May prompt the user for consent.
+  virtual void RequestFileSystem(
+      content::BrowserContext* browser_context,
+      scoped_refptr<UIThreadExtensionFunction> requester,
+      const Extension& extension,
+      std::string volume_id,
+      bool writable,
+      const FileSystemCallback& success_callback,
+      const ErrorCallback& error_callback) = 0;
+
+  // Immediately calls VolumeListCallback or ErrorCallback.
+  virtual void GetVolumeList(content::BrowserContext* browser_context,
+                             const VolumeListCallback& success_callback,
+                             const ErrorCallback& error_callback) = 0;
+#endif
+
+  virtual std::unique_ptr<file_system_api::SavedFilesServiceDelegate>
+  CreateSavedFilesServiceDelegate(content::BrowserContext* browser_context) = 0;
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_FILE_SYSTEM_FILE_SYSTEM_DELEGATE_H_