[Webkit-unassigned] [Bug 156232] New: 300ms delay on tap still present if apple-mobile-web-app-capable is 'yes'

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156232

            Bug ID: 156232
           Summary: 300ms delay on tap still present if
                    apple-mobile-web-app-capable is 'yes'
    Classification: Unclassified
           Product: WebKit
           Version: Safari 9
          Hardware: iOS
                OS: iOS 9.3
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Event Handling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kileras at gmail.com

Taping on a site with width=device-width, user-scalable=no or touch-action: manipulation still have a 300ms delay if the site is added to home screen and has 'apple-mobile-web-app-capable' set to yes.

Steps to Reproduce:

1 - Open Safari and go to http://output.jsbin.com/peqidufiko/6
2 - Add to that site to homescreen
3 - Open the home link and tap the button

Actual Results: 
The site shows a delay for taps of 300ms 

Expected Results:
The site should show no delay as it has the right metas and a touch-action defined.

Build Date & Platform:
Testes on an iPad Air with iOS 9.3.1 and a iPhone 6 Plus with iOS 9.3.1

Additional Information:
If you remove the 'apple-mobile-web-app-capable' or simply open the url in the browser then there is no delay between clicks at all as you will expect.

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