Aligns Blink's dispatch timing for animation "transitionrun" event and media query "change" event with the spec, making the timing interoperable with Gecko and WebKit. More precisely, as per HTML window event loop specification, "transitionrun" events will be fired at Step 3.11 even for animations created earlier in the same iteration (instead of delaying them for a later iteration), and the media query "change" event will be fired at Step 3.10 before firing any pending animation events (instead of intermixing them with animation events at Step 3.11).