UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36

Example URL:
https://jsfiddle.net/r6yw3kux/

Steps to reproduce the problem:
1. Have any form with input of type 'number' and step 'any'
2. Specify lang on the document, form, or the input to a language where comma is the decimal separator
3. (Optionally) also specify a pattern that allows commas

What is the expected behavior?
The user may use comma as a decimal separator

What went wrong?
Entering a comma is blocked

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes 

Chrome version: 48.0.2564.116  Channel: n/a
OS Version: 
Flash Version: 

Even if one would not make the input locale-aware in general, at least the pattern parameter should take precedence to allow the comma.