Pass origin clean flag of ImageBitmap when structure clone

      In this CL, we pass the origin clean flag of an ImageBitmap when this
ImageBitmap is being structure cloned, so that the receive of the
ImageBitmap is aware of this flag.

BUG=623406

Review-Url: https://codereview.chromium.org/2097393002
Cr-Commit-Position: refs/heads/master@{#402204}