26422 fuchsia: Delete all the legacy code! (cla: yes, Work in progress (WIP), platform-web, platform-fuchsia, tech-debt)

26438 Reclaim paragraph memory more aggressively (cla: yes, platform-web)

26456 support history entry replace in multi entries browser history (cla: yes, platform-web)

26492 fix a LateInitializationError (cla: yes, waiting for tree to go green, platform-web)

26518 Fix gradient stop out of range error (cla: yes, platform-web)

26519 Docuements the new flag in BrowserHistory.setRouteName (cla: yes, waiting for tree to go green, platform-web)