Look at the HTMLCanvasElement overload of this method for inspiration.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/754c97a74b5f84f5d7291c330dc23681cf600cfe

commit 754c97a74b5f84f5d7291c330dc23681cf600cfe
Author: Fernando Serboncini <fserb@chromium.org>
Date: Mon Oct 29 16:57:22 2018

Record GPU memory usage for OffscreenCanvas/ImageBitmap on V8

this allows V8 to know when we are using too much memory, which
triggers a GC.

Bug:  897733 , 842693 
Change-Id: I74c7589ab78a753132e54d5eac3c28793580c266
Reviewed-on: https://chromium-review.googlesource.com/c/1297067
Commit-Queue: Fernando Serboncini <fserb@chromium.org>
Reviewed-by: Mohammad Reza Zakerinasab <zakerinasab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603527}
[modify] https://crrev.com/754c97a74b5f84f5d7291c330dc23681cf600cfe/third_party/blink/renderer/core/html/canvas/html_canvas_element.cc
[modify] https://crrev.com/754c97a74b5f84f5d7291c330dc23681cf600cfe/third_party/blink/renderer/core/imagebitmap/image_bitmap.cc
[modify] https://crrev.com/754c97a74b5f84f5d7291c330dc23681cf600cfe/third_party/blink/renderer/core/imagebitmap/image_bitmap.h
[modify] https://crrev.com/754c97a74b5f84f5d7291c330dc23681cf600cfe/third_party/blink/renderer/core/offscreencanvas/offscreen_canvas.cc
[modify] https://crrev.com/754c97a74b5f84f5d7291c330dc23681cf600cfe/third_party/blink/renderer/core/offscreencanvas/offscreen_canvas.h