Electron Releases

Description of Change

• webContents.setBackgroundThrottling(false) on a WebContentsView whose window is still hidden left the view blank once the window was shown (until a resize) — RenderWidgetHostImpl::WasShown() was called directly, bypassing the view, so BrowserCompositorMac/DelegatedFrameHost never embedded the LocalSurfaceId the renderer was actually submitting to, and the real show() skipped its show handling because the host was already "shown".
• Un-hide via RenderWidgetHostViewBase::ShowWithVisibility(kHiddenButPainting) (the path content uses for a hidden-but-captured WebContents) so view, compositor and host stay in sync.
• Regression spec: capturePage() on a hidden WebContentsView after setBackgroundThrottling(false) + show() (fails on unfixed builds with "Current display surface not available for capture").

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• PR title follows semantic commit guidelines

Release Notes

Notes: Fixed a WebContentsView staying blank after its window is shown when setBackgroundThrottling(false) was called while the window was hidden.