UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Steps to reproduce the problem:
1. Add app crx file to Chrome.
2. On the apps page, launch the app called TestWebview.
3. Select any HTML file to open.

The Javascript is very simple and should be very easy to follow. Inspect the window and background pages.

What is the expected behavior?
Once the file is selected, it should immediately load into the webview via a Blob URL and be displayed.

What went wrong?
The incorrect behaviour is that you will see a blank window with a couple buttons at the top (which don't work, but that's beside the point). 

If you open the DevTools for the window, it should give a notice that the page load aborted. If you open the network tab of the webview devtools, it says the request was cancelled. 

However, if you open the DevTools of the window, copy the blob URL on the webview tag, and paste it into a browser window, it will load the HTML file as expected.

The error is: 

<webview>: The load has aborted with error -3: ERR_ABORTED.

Did this work before? Yes Probably 51 or 52.

Does this work in other browsers? N/A

Chrome version: 53.0.2785.143  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0
 

Deleted: TestWebviewApp.crx 3.0 KB

TestWebviewApp.crx 3.0 KB Download