GPURenderPassEncoder: pushDebugGroup() method

The pushDebugGroup() method of the GPURenderPassEncoder interface begins a render pass debug group, which is marked with a specified label, and will contain all subsequent encoded commands up until a popDebugGroup() method is invoked.

This could be used for telemetry, or may be utilized in GPUError messages, browser dev tools, or other services in the future to help with debugging.

pushDebugGroup(groupLabel)

// ...

const passEncoder = commandEncoder.beginRenderPass(renderPassDescriptor);

passEncoder.pushDebugGroup("mygroupmarker"); // Start labeled debug group

passEncoder.setPipeline(renderPipeline);
passEncoder.setVertexBuffer(0, vertexBuffer);
passEncoder.draw(3);

passEncoder.popDebugGroup();

// ...