Steps to reproduce the problem:
1. Download a PDF from this page https://jsfiddle.net/yxq115xs/5/ (click 'download' on right-down corner)
2. Click to open with Android PDF viewer

What is the expected behavior?
The file is open with the selected PDF viewer

What went wrong?
It shows a Toast message 'File can't be opened'

Did this work before? Yes 5.0

Chrome version: 55.0.2883.87  Channel: n/a
OS Version: 6.0.1
Flash Version: Shockwave Flash 24.0 r0

Nexus 5 - Chrome + Android PDF Viewer --> FAIL
Nexus 5 - Chrome + Adobe Reader --> FAIL
Nexus 5 - Android PDF Viewer (with file explorer) --> OK

Nexus 5x (android 7.1.1) - Chrome + Android PDF Viewer --> FAIL
Nexus 5x (android 7.1.1) - Chrome + Adobe Reader --> OK
Nexus 5x (android 7.1.1) - Android PDF Viewer (with file explorer) --> OK