Electron Releases

Description of Change

Fixes #53286
Refs CL:7806164

• Chromium 150 moved the authoritative cross-origin file-picker check from the renderer-side ContentClient::IsFilePickerAllowedForCrossOriginSubframe() to a new browser-side ContentBrowserClient::IsCrossOriginSubframeAllowedToShowFilePicker() hook. Electron only overrode the old hook (#51042), so the browser-side check fell through to the default and denied the PDF viewer's "save with your changes" picker with NotAllowedError: Third party iframes are not allowed to show a file picker.
• Override the new hook for the PDF extension origin, matching Chrome's fast path in ChromeContentBrowserClient.

Verified locally on Linux by loading a PDF and calling window.showSaveFilePicker() from the PDF extension frame with a user gesture: before this change it rejects with the error above, after it the native save dialog opens.

Checklist

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Release Notes

Notes: Fixed the PDF viewer failing to save an edited PDF with NotAllowedError: Third party iframes are not allowed to show a file picker.