r.browser.k@ - simple WebView.apk, which you attached can't be opened (it shows in the list of Android Apps though).

I have tried on Nexus 6P(6.0.1/MOB31V) with steps #1 using our browser on 56.0.2924.78 & 57.0.2987.38. It gives webpage not available error. It is not even working on older WebView:53.0.2785.124.

Did it ever worked for you in the previous Webview builds ? If so, which builds ? What device are you using?

Thanks!
 

No feedback was received in the last 30 days from reporter "r.browser.k@gmail.com", so archiving this. Please re-open or file a new bug if this is still an issue.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Sorry, this problem happens on Android TV.
Please install [simple WebView.apk] to Android TV device (for example Nexus Player).

Thank you for providing more feedback. Adding requester "satyavathir@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

This issue is reproducible on the nexus player with Android M, attached logcat/bugreport for further investigating 

Deleted: SimpleWebview.txt 541 KB

SimpleWebview.txt 541 KB View Download

The error output attached in the OP is:

Resource interpreted as Document but transferred with MIME type image/gif: "https://s.yimg.jp/images/approach/jslib/clear.gif?method=init&callback=mobiledeeplinkingcallback1485827125574".
(anonymous)  deeplink-2.0.2.js:6
main-built.js:54 Uncaught TypeError: Cannot read property 'getItem' of null
 at new t.LocalStorage.window.Store (main-built.js:54)
 at main-built.js:54
 at Object.execCb (main-built.js:54)
 at w.check (main-built.js:54)
 at w.enable (main-built.js:54)
 at Object.enable (main-built.js:54)
 at w.<anonymous> (main-built.js:54)
 at main-built.js:54
 at x (main-built.js:54)
 at w.enable (main-built.js:54)

which stems from
https://cs.chromium.org/chromium/src/third_party/WebKit/Source/devtools/front_end/sdk/NetworkManager.js?l=314&rcl=02a5570113be8e6b477de968c8eeb62ffce9ae62

I'm not familiar with that code.
dgozman@ do you know what this means (whether it's an error with the page or with the browser)?

When I load map.yahoo.co.jp using the WebView shell and WebView version 61.0.3163.81 I just get a 'Webpage not available', net::ERR_UNKNOWN_URL_SCHEME error.

Sounds like a problem with web page (or WebView setup). DevTools hints on image/gif resource being used as Document (and probably failing to render because of that). I am not a WebView expert though.

Try using Network panel in DevTools to see what comes over network.

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot