diff --git a/brightray/browser/inspectable_web_contents_delegate.h b/brightray/browser/inspectable_web_contents_delegate.h
index 606bfa9a4ea9..9c4ee722c2a3 100644
--- a/brightray/browser/inspectable_web_contents_delegate.h
+++ b/brightray/browser/inspectable_web_contents_delegate.h
@@ -14,9 +14,10 @@ class InspectableWebContentsDelegate {
       const std::string& url, const std::string& content, bool save_as) {}
   virtual void DevToolsAppendToFile(
       const std::string& url, const std::string& content) {}
-  virtual void DevToolsAddFileSystem() {}
+  virtual void DevToolsAddFileSystem(
+      const base::FilePath& file_system_path) {}
   virtual void DevToolsRemoveFileSystem(
-      const std::string& file_system_path) {}
+      const base::FilePath& file_system_path) {}
 };
 
 }  // namespace brightray
diff --git a/brightray/browser/inspectable_web_contents_impl.cc b/brightray/browser/inspectable_web_contents_impl.cc
index fa62d3d202a6..ba566f2339fa 100644
--- a/brightray/browser/inspectable_web_contents_impl.cc
+++ b/brightray/browser/inspectable_web_contents_impl.cc
@@ -374,13 +374,14 @@ void InspectableWebContentsImpl::RequestFileSystems() {
 
 void InspectableWebContentsImpl::AddFileSystem() {
   if (delegate_)
-    delegate_->DevToolsAddFileSystem();
+    delegate_->DevToolsAddFileSystem(base::FilePath());
 }
 
 void InspectableWebContentsImpl::RemoveFileSystem(
     const std::string& file_system_path) {
   if (delegate_)
-    delegate_->DevToolsRemoveFileSystem(file_system_path);
+    delegate_->DevToolsRemoveFileSystem(
+        base::FilePath::FromUTF8Unsafe(file_system_path));
 }
 
 void InspectableWebContentsImpl::UpgradeDraggedFileSystemPermissions(