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This always uses the unaccelerated path right now, if we find these
cases are common, we will need to improve VideoFrameYUVConverter so the
hardware based conversion process works.

Note: This inlines the preferAcceleratedImageBitmap() function to make
it more clear when the accelerated path is preferred.

R=sandersd

Bug: 1148800
Change-Id: I8f669ade90d9f4133ffe15a63c8c47d22a1dc286
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2542671
Auto-Submit: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828025}