Chromium changes: https://chromium.googlesource.com/chromium/src/+/08483c4fea866719a9712db5d9a2d1ed531628f4 commit 08483c4fea866719a9712db5d9a2d1ed531628f4 Author: Hitarth Kothari <hitarthkothari@google.com> Date: Mon Feb 23 12:50:37 2026 -0800 [ThinWebView] Add ThinWebViewContextMenuItemDelegate This CL adds context menu support for ThinWebView (used in the Preview/Ephemeral Tab) on Android. Key Changes: New Delegate: Implemented ThinWebViewContextMenuItemDelegate to handle actions like "Copy to clipboard" and "Open in default browser" for ThinWebView. New Menu Mode: Added ContextMenuMode.THIN_WEB_VIEW to ChromeContextMenuPopulator, providing a streamlined menu that excludes standard tab features (like "Read Later" or "Open in New Tab"). Integration: Updated EphemeralTabCoordinator and ThinWebViewImpl to initialize and pass the context menu populator factory through the UI stack. ChromeContextMenuPopulatorTest to verify correct menu item filtering for the new mode. Testing: Added comprehensive unit tests in Bug: 483656137 Change-Id: I4f293a21bd1a7eb74f90b2b06750aa7bb6473b67 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7572842 Reviewed-by: Calder Kitagawa <ckitagawa@chromium.org> Auto-Submit: Hitarth Kothari <hitarthkothari@google.com> Reviewed-by: Jinsuk Kim <jinsukkim@chromium.org> Reviewed-by: Shakti Sahu <shaktisahu@chromium.org> Commit-Queue: Hitarth Kothari <hitarthkothari@google.com> Cr-Commit-Position: refs/heads/main@{#1588868}