[SxS] Implement support for split view in extensions API This emits update events when split tabs are created or removed, includes the split ID when querying tabs, and allows filtering by that split ID. Manually tested by creating an extension to query tabs (with and without split id filter) and check for update events when creating and removing a split. WECG proposal: https://github.com/w3c/webextensions/pull/842 Bug: 406794014 Change-Id: Ida091cb808024eedf70c76007b9ac2e8fe043ef7 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6765740 Commit-Queue: Alison Gale <agale@chromium.org> Reviewed-by: Solomon Kinard <solomonkinard@chromium.org> Reviewed-by: Devlin Cronin <rdevlin.cronin@chromium.org> Cr-Commit-Position: refs/heads/main@{#1490240} NOKEYCHECK=True GitOrigin-RevId: 56fbc795292fb0406538d3170ef3c7fae919b9c4 1 file changed
