Bug 54284 – Continues relayout on pages containing iframes when frame flattening is on

• Status: UNCONFIRMED
• Component: Frames

[Piotr Roguski]

Created attachment 82132 [details]
archive containing iframe.html and blink.html

This issue affects performance. When page with nested iframes is visited, continues relayout can be observed when iframes source contains elements with padding set by styles. This issue can be reproduced only when frame flattening is on.

Steps to reproduce:
1. set frame flattening on
2. visit example site iframe.html (check attachment )

BR,
Piotrek

[Ryuan Choi]

I tested and reproduced same problem in GTK+, EFL, Qt port.

[Piotr Roguski]

Created attachment 84710 [details]
patch with fix for reported issue

[WebKit Review Bot]

Attachment 84710 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/ChangeLog', u'Source/WebCor..." exit_code: 1

Source/WebCore/ChangeLog:5:  Line contains tab character.  [whitespace/tab] [5]
Total errors found: 1 in 4 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Piotr Roguski]

Created attachment 84941 [details]
fixed style issue

[Antonio Gomes]

Comment on attachment 84941 [details]
fixed style issue

View in context: https://bugs.webkit.org/attachment.cgi?id=84941&action=review

Lets add a layout test so it does not regress. If it is not possible, explain why or provide at least a manual test.

> Source/WebCore/ChangeLog:3
> +        Unreviewed

Do not change this line: leave the "Review by NOBODY (OOPS)"