From http://www.whatwg.org/specs/web-apps/current-work/complete.html#the-progress-element-0 , user agents should distinguish between determinate and indeterminate progress bars.
Created http://bugreports.qt.nokia.com/browse/QTBUG-9171 for a Qt API to support this in the Qt port.
Created attachment 51160 [details] Patch v1 This patch is blocked by https://bugs.webkit.org/show_bug.cgi?id=36206, so it contains the code from there. I will update as soon as https://bugs.webkit.org/show_bug.cgi?id=36206 changes status. This patch adds the possibility to animate the progress bar. The time interval and if the animate the progress bar is queried from the RenderTheme. It also removes some optimization code I previously added that was not welcome.
Created attachment 51337 [details] Patch. Updated the tests from the previous patch. This patch adds support, test results and enables the PROGRESS_TAG flag on the Mac port of Safari.
Created attachment 51423 [details] Patch Update XCode project file after 56360 and 56361, to make the GTK build bot happy.
The original issue reported here was resolved in https://bugs.webkit.org/show_bug.cgi?id=36664 *** This bug has been marked as a duplicate of bug 36664 ***