[Webkit-unassigned] [Bug 143527] New: image map area focus ring location sometimes incorrect

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=143527

            Bug ID: 143527
           Summary: image map area focus ring location sometimes incorrect
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Macintosh Intel
                OS: Mac OS X 10.10
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: webkit at rebertia.com

Created attachment 250363
  --> https://bugs.webkit.org/attachment.cgi?id=250363&action=review
Top focus ring location is correct, Bottom focus ring within modal is wrong

Environment:
Safari Version 8.0.4 (10600.4.10.7)

Steps to reproduce:
1. Open http://jsbin.com/tufoye/2/edit
2. Resize the Output pane to be at least 800px wide.
3. Hover over the lower-left part of the gray rectangle where the mouse cursor becomes the gloved-hand pointer.
   (Which is to say that you're hovering over the image map's <area>.)
4. Click.
5. Note the location of the circular blue focus ring that appears.
6. Click the "Launch demo modal" button.
7. In the modal box that appears, click the same location in its gray rectangle image map.
8. Note the location of the circular blue focus ring that appears.

Expected result:
The locations of the focus rings in steps 5 & 8 should be the same relative to their respective gray rectangle image maps.

Actual result:
The location of the focus ring in step 8 is incorrect and differs from that of the focus ring in step 5.

Original Bootstrap bug report:
https://github.com/twbs/bootstrap/issues/16180

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