DevTools: Add support for adding folders to DevTools workspace with drag and drop (browser part)

chrome/browser/devtools/devtools_file_helper.h

Index: chrome/browser/devtools/devtools_file_helper.h
diff --git a/chrome/browser/devtools/devtools_file_helper.h b/chrome/browser/devtools/devtools_file_helper.h
index 11c4b96a0b192551fd87620b36e07e6ba480ddd8..2adadfbfe079cf7b9e815738753ee3cd7f10f70c 100644
--- a/chrome/browser/devtools/devtools_file_helper.h
+++ b/chrome/browser/devtools/devtools_file_helper.h
@@ -71,14 +71,29 @@ class DevToolsFileHelper {
   // Shows select folder dialog.
   // If user cancels folder selection, passes empty FileSystem struct to
   // |callback|.
-  // If selected folder contains magic file, grants renderer read/write
+  // Shows infobar by means of |show_info_bar_callback| to let the user decide
+  // whether to grant security permissions or not.
+  // If user allows adding file system in infobar, grants renderer read/write
   // permissions, registers isolated file system for it and passes FileSystem
   // struct to |callback|. Saves file system path to prefs.
-  // If selected folder does not contain magic file, passes error string to
+  // If user denies adding file system in infobar, passes error string to
   // |callback|.
   void AddFileSystem(const AddFileSystemCallback& callback,
                      const ShowInfoBarCallback& show_info_bar_callback);
 
+  // Upgrades dragged file system permissions to a read-write access.
+  // Shows infobar by means of |show_info_bar_callback| to let the user decide
+  // whether to grant security permissions or not.
+  // If user allows adding file system in infobar, grants renderer read/write
+  // permissions, registers isolated file system for it and passes FileSystem
+  // struct to |callback|. Saves file system path to prefs.
+  // If user denies adding file system in infobar, passes error string to
+  // |callback|.
+  void UpgradeDraggedFileSystemPermissions(
+      const std::string& file_system_url,
+      const AddFileSystemCallback& callback,
+      const ShowInfoBarCallback& show_info_bar_callback);
+
   // Loads file system paths from prefs, grants permissions and registers
   // isolated file system for those of them that contain magic file and passes
   // FileSystem structs for registered file systems to |callback|.