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This uses yuv_util's ConvertFromVideoFrameYUV to import VideoFrame
into SkImage converting YUV to RGB, and then creates
AcceleratedStaticBitmapImage with the RGB SkImage. Finally given
the AcceleratedStaticBitmapImage, ImageBitmap can be directly
constructed from it.
In this way, VideoFrame from either software or hardware decoder
is supported, and the format may only be NV12 or I420.
The current test case only covers software decoder. Once hardware
decoder is available, new test case should be added.

Bug: 897297
Change-Id: I961bc8506f69f86d395736af458157c53579c81e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2242724Reviewed-by: Dan Sanders <sandersd@chromium.org>
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>
Cr-Commit-Position: refs/heads/master@{#779627}