enne@ is working in replacing Blink and ui’s use of SkPicture with a new custom display list backing to store recorded paint commands while keeping the painting API mostly unchanged. In this big CL written by her (https://chromium.googlesource.com/chromium/src/+/34f6084cd35016a633942588724e6dd7dae428a3), it looks like Canvas2DLayerBridge is just part of the many classes that had SkPicture replaced with PaintOpBuffer already (via an alias "PaintRecord" as seen in https://cs.chromium.org/chromium/src/cc/paint/paint_record.h?l=17).

I guess there is not much we need to do for this CL then.

Yeah, it looks like Canvas2DLayerBridge is already using PaintOpBuffers, via PaintRecord.  Let's just close this.