Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 5a58e93edb20ab59cf9999c175eb72eee13e2adf
      
https://github.com/WebKit/WebKit/commit/5a58e93edb20ab59cf9999c175eb72eee13e2adf
  Author: Brandon Stewart <[email protected]>
  Date:   2026-04-17 (Fri, 17 Apr 2026)

  Changed paths:
    A 
LayoutTests/http/tests/site-isolation/inspector/page/resources/emulated-media-frame.html
    A 
LayoutTests/http/tests/site-isolation/inspector/page/set-emulated-media-cross-origin-iframe-expected.txt
    A 
LayoutTests/http/tests/site-isolation/inspector/page/set-emulated-media-cross-origin-iframe.html
    M LayoutTests/platform/mac-site-isolation/TestExpectations
    M LayoutTests/platform/mac-wk2/TestExpectations

  Log Message:
  -----------
  [Web Inspector] [Site Isolation] Add inspector test for Page.setEmulatedMedia 
with cross-origin iframes under site isolation
https://bugs.webkit.org/show_bug.cgi?id=311836
rdar://174427083

Reviewed by BJ Burg.

Add a layout test that verifies Page.setEmulatedMedia propagates to
cross-origin iframes when site isolation is enabled. The test emulates
print media via Web Inspector, reloads, and confirms that @media print
styles in a cross-origin iframe (running in a separate process) are
correctly applied.

* 
LayoutTests/http/tests/site-isolation/inspector/page/resources/emulated-media-frame.html:
 Added.
* 
LayoutTests/http/tests/site-isolation/inspector/page/set-emulated-media-cross-origin-iframe-expected.txt:
 Added.
* 
LayoutTests/http/tests/site-isolation/inspector/page/set-emulated-media-cross-origin-iframe.html:
 Added.
* LayoutTests/platform/mac-site-isolation/TestExpectations:
* LayoutTests/platform/mac-wk2/TestExpectations:

Canonical link: https://commits.webkit.org/311447@main



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