delegate filesystem request calls

brightray/browser/inspectable_web_contents_delegate.h

@@ -20,6 +20,9 @@ class InspectableWebContentsDelegate {
   virtual void DevToolsAppendToFile(
       const std::string& url, const std::string& content) {}
   virtual void DevToolsFocused() {}
+  virtual void DevToolsAddFileSystem() {}
+  virtual void DevToolsRemoveFileSystem(
+      const std::string& file_system_path) {}
 
 #if defined(USE_X11)
   // Called when creating devtools window.

brightray/browser/inspectable_web_contents_impl.cc

@@ -265,10 +265,14 @@ void InspectableWebContentsImpl::RequestFileSystems() {
 }
 
 void InspectableWebContentsImpl::AddFileSystem() {
+  if (delegate_)
+    delegate_->DevToolsAddFileSystem();
 }
 
 void InspectableWebContentsImpl::RemoveFileSystem(
     const std::string& file_system_path) {
+  if (delegate_)
+    delegate_->DevToolsRemoveFileSystem(file_system_path);
 }
 
 void InspectableWebContentsImpl::UpgradeDraggedFileSystemPermissions(