Martin Robinson 6ffc0cd482 libservo: Add a WebView::take_screenshot() API and use it for reftests (#39583) ...

This change adds a new API to the `WebView` for capturing screenshots.
This makes it possible to:

 - use the reftest waiting infrastructure via the API
   easily.
 - take more than a single screenshot in one Servo run.
 - take screenshots, but still paint the `WebView` normally prior
   to the moment that the screenshot is ready, instead of preventing
   all non-screenshot-ready paints while taking a screenshot.

In addition, the previous infrastructure, the `wait_for_stable_image`
option is removed completely.

Testing: This change is tested by the passing of the WPT tests,
as they commonly use the screenshot feature.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Delan Azabani <dazabani@igalia.com>

2025-09-30 11:39:47 +00:00

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