Steps to reproduce the problem:
1. Load a WebView with https://jsfiddle.net/gabrielmaldi/0sxqef16/show
2. Nothing is drawn on the canvas

What is the expected behavior?
A pie chart is displayed

What went wrong?
This only repros inside a WebView. It works fine in Chrome browser in the same device.

Setting `webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null)` makes the chart be drawn, but isn't desirable at all since it disables hardware acceleration.

This used to work in previous Android/Chrome WebView versions.

Did this work before? Yes 

Does this work in other browsers? Yes

Chrome version: 66.0.3359.158  Channel: n/a
OS Version: Android Pie 9
Flash Version: