Automatically open FSP mounted file systems.

ui/file_manager/file_manager/foreground/js/directory_model.js

Index: ui/file_manager/file_manager/foreground/js/directory_model.js
diff --git a/ui/file_manager/file_manager/foreground/js/directory_model.js b/ui/file_manager/file_manager/foreground/js/directory_model.js
index ac27ae8b1dc7d35dbb18507d5a297fe464da72d9..c46055c0a921dc9c2a632f38d597482e215449ad 100644
--- a/ui/file_manager/file_manager/foreground/js/directory_model.js
+++ b/ui/file_manager/file_manager/foreground/js/directory_model.js
@@ -998,6 +998,16 @@ DirectoryModel.prototype.onVolumeInfoListUpdated_ = function(event) {
       this.changeDirectoryEntry(displayRoot);
     }.bind(this));
   }
+
+  // If a new provided volume is mounted, then redirect to it in the focused
+  // window. Note, that this is a temporary solution for crbug.com/427776.
+  if (window.isFocused() &&
+      event.added.length === 1 &&
+      event.added[0].volumeType ==
+          VolumeManagerCommon.VolumeType.VOLUME_TYPE_PROVIDED &&
+      event.added[0].displayRoot) {
+    this.changeDirectoryEntry(event.added[0].displayRoot);
+  }
 };
 
 /**