Support file system access in DevTools with isolated file system.

content/public/browser/devtools_frontend_host_delegate.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_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_DELEGATE_H_
 
 #include <string>
 
 namespace content {
@@ skipping 24 matching lines @@
   // Save As dialog.
   virtual void SaveToFile(const std::string& url,
                           const std::string& content,
                           bool save_as) = 0;
 
   // Appends given |content| to the file that has been associated with the
   // given |url| by SaveToFile method.
   virtual void AppendToFile(const std::string& url,
                             const std::string& content) = 0;
 
+  // Requests the list of file systems added for devtools previously.
+  virtual void RequestFileSystems() = 0;
+
+  // Shows a dialog to select a folder to add an isolated file system for.
+  virtual void AddFileSystem() = 0;
+
+  // Removes previously added devtools file system by given |file_system_path|.
+  virtual void RemoveFileSystem(const std::string& file_system_path) = 0;
+
   // This method is called when the contents inspected by this devtools frontend
   // is closing.
   virtual void InspectedContentsClosing() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_DELEGATE_H_