From the post:
To give web developers the tools they need to create high quality touch-driven interactions, we are retooling Blink's core rendering engine to run smoothly at 60 Hz. Specifically:
1) We are switching the style and layout subsystems to be driven by animation frames instead of by arbitrary timers, reducing synchronization issues between these subsystems and the compositor.
2) We are making the rendering engine's state machine explicit to be more disciplined about what information can be read in which state, removing the need to continually recompute compositing state
3) We are minimizing the amount of retained state that's invalidated inside the engine in response to DOM mutations, reducing the total amount of work the engine need to perform in order to compute the next animation frame. #perfmatters