Version: 53
OS: Chrome

What steps will reproduce the problem?
(1) Install an app with a bad manifest (e.g., at the time of writing, https://chrome.google.com/webstore/detail/hangouts-chrome/imbdlpecbbjkddpcfcjhkeadjcilkihp).

What is the expected output?
Downloads, tries to installs, error message.

What do you see instead?
Downloads, nothing happens.

If you install the same app from the web store, there is an error message displayed ("Package is invalid. Details: 'Could not load extension icon 'icon/128.png'.'.").